common: Move ARM cache operations out of common.h

These functions are CPU-related and do not use driver model. Move them to
cpu_func.h

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/cpu/armv7/ls102xa/ls102xa_psci.c b/arch/arm/cpu/armv7/ls102xa/ls102xa_psci.c
index df64f54..4a4b3c6 100644
--- a/arch/arm/cpu/armv7/ls102xa/ls102xa_psci.c
+++ b/arch/arm/cpu/armv7/ls102xa/ls102xa_psci.c
@@ -6,6 +6,7 @@
  */
 
 #include <config.h>
+#include <cpu_func.h>
 #include <asm/io.h>
 #include <asm/psci.h>
 #include <asm/arch/immap_ls102xa.h>