arm: omap2: Remove <common.h> and add needed includes

Remove <common.h> from all mach-omap2 files and when needed add
missing include files directly.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/mach-omap2/mem-common.c b/arch/arm/mach-omap2/mem-common.c
index 1919748..00f144e 100644
--- a/arch/arm/mach-omap2/mem-common.c
+++ b/arch/arm/mach-omap2/mem-common.c
@@ -12,7 +12,7 @@
  *     Syed Mohammed Khasim <khasim@ti.com>
  */
 
-#include <common.h>
+#include <config.h>
 #include <asm/io.h>
 #include <asm/arch/cpu.h>
 #if IS_ENABLED(CONFIG_TARGET_AM335X_GUARDIAN)