arm: timer and interrupt init rework

actually the timer init use the interrupt_init as init callback
which make the interrupt and timer implementation difficult to follow

so now rename it as int timer_init(void) and use interrupt_init for interrupt

btw also remane the corresponding file to the functionnality implemented

as ixp arch implement two timer - one based on interrupt - so all the timer
related code is moved to timer.c

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/board/armltd/integratorap/integratorap.c b/board/armltd/integratorap/integratorap.c
index 9631967..5ececd6 100644
--- a/board/armltd/integratorap/integratorap.c
+++ b/board/armltd/integratorap/integratorap.c
@@ -540,7 +540,7 @@
  * - the Integrator/AP timer issues an interrupt
  *   each time it reaches zero
  */
-int interrupt_init (void)
+int timer_init (void)
 {
 	/* Load timer with initial value */
 	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 0) = TIMER_LOAD_VAL;
diff --git a/board/armltd/integratorcp/integratorcp.c b/board/armltd/integratorcp/integratorcp.c
index 72629ce..0d3afd8 100644
--- a/board/armltd/integratorcp/integratorcp.c
+++ b/board/armltd/integratorcp/integratorcp.c
@@ -163,7 +163,7 @@
 
 /* starts up a counter
  * - the Integrator/CP timer can be set up to issue an interrupt */
-int interrupt_init (void)
+int timer_init (void)
 {
 	/* Load timer with initial value */
 	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 0) = TIMER_LOAD_VAL;
diff --git a/board/atmel/at91cap9adk/at91cap9adk.c b/board/atmel/at91cap9adk/at91cap9adk.c
index f52edaa..9f73df6 100644
--- a/board/atmel/at91cap9adk/at91cap9adk.c
+++ b/board/atmel/at91cap9adk/at91cap9adk.c
@@ -61,7 +61,6 @@
 	if (at91_sys_read(AT91_PMC_VER) == ARCH_ID_AT91CAP9_REVC) {
 		unsigned i, tmp = at91_sys_read(AT91_SCKCR);
 		if ((tmp & AT91CAP9_SCKCR_OSCSEL) == AT91CAP9_SCKCR_OSCSEL_RC) {
-			extern void timer_init(void);
 			timer_init();
 			tmp |= AT91CAP9_SCKCR_OSC32EN;
 			at91_sys_write(AT91_SCKCR, tmp);
diff --git a/board/davinci/common/misc.h b/board/davinci/common/misc.h
index 4a57dbb..5d29784 100644
--- a/board/davinci/common/misc.h
+++ b/board/davinci/common/misc.h
@@ -22,7 +22,6 @@
 #ifndef __MISC_H
 #define __MISC_H
 
-extern void timer_init(void);
 extern int eth_hw_init(void);
 
 void dv_display_clk_infos(void);
diff --git a/board/m501sk/m501sk.c b/board/m501sk/m501sk.c
index dc5b786..1e6a605 100644
--- a/board/m501sk/m501sk.c
+++ b/board/m501sk/m501sk.c
@@ -127,7 +127,7 @@
 	m501sk_gpio_init();
 
 	/* Do interrupt init here, because flash needs timers */
-	interrupt_init();
+	timer_init();
 	flash_init();
 
 	return 0;
diff --git a/board/netstar/netstar.c b/board/netstar/netstar.c
index ee4f2cd..ffd60bf 100644
--- a/board/netstar/netstar.c
+++ b/board/netstar/netstar.c
@@ -48,7 +48,7 @@
 	/* Take the Ethernet controller out of reset and wait
 	 * for the EEPROM load to complete. */
 	*((volatile unsigned short *) GPIO_DATA_OUTPUT_REG) |= 0x80;
-	udelay(10);	/* doesn't work before interrupt_init call */
+	udelay(10);	/* doesn't work before timer_init call */
 	*((volatile unsigned short *) GPIO_DATA_OUTPUT_REG) &= ~0x80;
 	udelay(500);
 
diff --git a/board/voiceblue/voiceblue.c b/board/voiceblue/voiceblue.c
index c8dde36..59b3310 100644
--- a/board/voiceblue/voiceblue.c
+++ b/board/voiceblue/voiceblue.c
@@ -43,7 +43,7 @@
 	/* Take the Ethernet controller out of reset and wait
 	 * for the EEPROM load to complete. */
 	*((volatile unsigned short *) GPIO_DATA_OUTPUT_REG) |= 0x80;
-	udelay(10);	/* doesn't work before interrupt_init call */
+	udelay(10);	/* doesn't work before timer_init call */
 	*((volatile unsigned short *) GPIO_DATA_OUTPUT_REG) &= ~0x80;
 	udelay(500);