pxa: fixing get_timer to return time in miliseconds.

Fixing the get_timer function to return time in miliseconds instead of
ticks. Also fixed PXA boards to use the conventional value of 1000 for
CONFIG_SYS_HZ.

Signed-off-by: Micha Kalfon <smichak.uv@gmail.com>
diff --git a/include/configs/zylonite.h b/include/configs/zylonite.h
index 31ea4ca..58f35a9 100644
--- a/include/configs/zylonite.h
+++ b/include/configs/zylonite.h
@@ -143,7 +143,7 @@
 
 #define CONFIG_SYS_LOAD_ADDR	(CONFIG_SYS_DRAM_BASE + 0x8000) /* default load address */
 
-#define CONFIG_SYS_HZ			3250000		/* incrementer freq: 3.25 MHz */
+#define CONFIG_SYS_HZ			1000
 
 /* Monahans Core Frequency */
 #define CONFIG_SYS_MONAHANS_RUN_MODE_OSC_RATIO		16 /* valid values: 8, 16, 24, 31 */