common: Drop linux/delay.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/ata/ahci_sunxi.c b/drivers/ata/ahci_sunxi.c
index 989690a..58e345d 100644
--- a/drivers/ata/ahci_sunxi.c
+++ b/drivers/ata/ahci_sunxi.c
@@ -6,6 +6,7 @@
 #include <errno.h>
 #include <asm/io.h>
 #include <asm/gpio.h>
+#include <linux/delay.h>
 
 #define AHCI_PHYCS0R 0x00c0
 #define AHCI_PHYCS1R 0x00c4