arm: Don't include common.h in header files

It is bad practice to include common.h in other header files since it can
bring in any number of superfluous definitions. It implies that some C
files don't include it and thus may be missing CONFIG options that are set
up by that file. The C files should include these themselves.

Update some header files in arch/arm to drop this.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/mtd/nand/raw/denali_dt.c b/drivers/mtd/nand/raw/denali_dt.c
index 41b93e6..2728e80 100644
--- a/drivers/mtd/nand/raw/denali_dt.c
+++ b/drivers/mtd/nand/raw/denali_dt.c
@@ -7,6 +7,8 @@
 #include <clk.h>
 #include <dm.h>
 #include <dm/device_compat.h>
+#include <linux/bug.h>
+#include <linux/delay.h>
 #include <linux/io.h>
 #include <linux/ioport.h>
 #include <linux/printk.h>