Rename getenv_r() into getenv_f()

While running from flash, i. e. before relocation, we have only a
limited C runtime environment without writable data segment. In this
phase, some configurations (for example with environment in EEPROM)
must not use the normal getenv(), but a special function.  This
function had been called getenv_r(), with the idea that the "_r"
suffix would mean the same as in the _r_eentrant versions of some of
the C library functions (for example getdate vs. getdate_r, getgrent
vs. getgrent_r, etc.).

Unfortunately this was a misleading name, as in U-Boot the "_r"
generally means "running from RAM", i. e. _after_ relocation.

To avoid confusion, rename into getenv_f() [as "running from flash"]

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
diff --git a/arch/powerpc/cpu/mpc8xx/speed.c b/arch/powerpc/cpu/mpc8xx/speed.c
index f309f29..6e13e5d 100644
--- a/arch/powerpc/cpu/mpc8xx/speed.c
+++ b/arch/powerpc/cpu/mpc8xx/speed.c
@@ -266,7 +266,7 @@
 	long		  cpuclk = 0;
 	long		  sccr_reg;
 
-	if (getenv_r ("cpuclk", tmp, sizeof (tmp)) > 0)
+	if (getenv_f("cpuclk", tmp, sizeof (tmp)) > 0)
 		cpuclk = simple_strtoul (tmp, NULL, 10) * 1000000;
 
 	if ((CONFIG_SYS_8xx_CPUCLK_MIN > cpuclk) || (CONFIG_SYS_8xx_CPUCLK_MAX < cpuclk))
diff --git a/arch/powerpc/cpu/ppc4xx/4xx_ibm_ddr2_autocalib.c b/arch/powerpc/cpu/ppc4xx/4xx_ibm_ddr2_autocalib.c
index 2fee995..2cfc37f 100644
--- a/arch/powerpc/cpu/ppc4xx/4xx_ibm_ddr2_autocalib.c
+++ b/arch/powerpc/cpu/ppc4xx/4xx_ibm_ddr2_autocalib.c
@@ -985,7 +985,7 @@
 	puts(str);
 
 #if defined(DEBUG_PPC4xx_DDR_AUTOCALIBRATION)
-	i = getenv_r("autocalib", tmp, sizeof(tmp));
+	i = getenv_f("autocalib", tmp, sizeof(tmp));
 	if (i < 0)
 		strcpy(tmp, CONFIG_AUTOCALIB);
 
diff --git a/arch/powerpc/lib/board.c b/arch/powerpc/lib/board.c
index 7b09fb5..0e00d86 100644
--- a/arch/powerpc/lib/board.c
+++ b/arch/powerpc/lib/board.c
@@ -169,7 +169,7 @@
 static int init_baudrate (void)
 {
 	char tmp[64];	/* long enough for environment variables */
-	int i = getenv_r ("baudrate", tmp, sizeof (tmp));
+	int i = getenv_f("baudrate", tmp, sizeof (tmp));
 
 	gd->baudrate = (i > 0)
 			? (int) simple_strtoul (tmp, NULL, 10)
@@ -442,7 +442,7 @@
 	/*
 	 * reserve protected RAM
 	 */
-	i = getenv_r ("pram", (char *)tmp, sizeof (tmp));
+	i = getenv_f("pram", (char *)tmp, sizeof (tmp));
 	reg = (i > 0) ? simple_strtoul ((const char *)tmp, NULL, 10) : CONFIG_PRAM;
 	addr -= (reg << 10);		/* size is in kB */
 	debug ("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
@@ -790,7 +790,7 @@
 	 * Fill in missing fields of bd_info.
 	 * We do this here, where we have "normal" access to the
 	 * environment; we used to do this still running from ROM,
-	 * where had to use getenv_r(), which can be pretty slow when
+	 * where had to use getenv_f(), which can be pretty slow when
 	 * the environment is in EEPROM.
 	 */