imx: fix coding style

Fix checkpatch warning and errors in several i.MX related files.

While at it also address a checkpatch warning at arch/arm/cpu/armv7/mx5/soc.c
regarding the usage of extern in a C file.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
diff --git a/arch/arm/cpu/arm926ejs/mx27/reset.c b/arch/arm/cpu/arm926ejs/mx27/reset.c
index 6c54eaf..cc0a33e 100644
--- a/arch/arm/cpu/arm926ejs/mx27/reset.c
+++ b/arch/arm/cpu/arm926ejs/mx27/reset.c
@@ -39,7 +39,7 @@
 /*
  * Reset the cpu by setting up the watchdog timer and let it time out
  */
-void reset_cpu (ulong ignored)
+void reset_cpu(ulong ignored)
 {
 	struct wdog_regs *regs = (struct wdog_regs *)IMX_WDT_BASE;
 	/* Disable watchdog and set Time-Out field to 0 */