common: Drop part.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/mach-snapdragon/dram.c b/arch/arm/mach-snapdragon/dram.c
index 79eb199..12c26a9 100644
--- a/arch/arm/mach-snapdragon/dram.c
+++ b/arch/arm/mach-snapdragon/dram.c
@@ -8,6 +8,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <part.h>
 #include <smem.h>
 #include <fdt_support.h>
 #include <asm/arch/dram.h>