spi: pl022: Drop unnecessary include files

This patch can drop unnecessary include files in
pl022_spi driver.

Acked-by: Quentin Schulz <quentin.schulz@bootlin.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/drivers/spi/pl022_spi.c b/drivers/spi/pl022_spi.c
index 05f4f6f..f2e5367 100644
--- a/drivers/spi/pl022_spi.c
+++ b/drivers/spi/pl022_spi.c
@@ -9,16 +9,11 @@
  * Driver for ARM PL022 SPI Controller.
  */
 
-#include <asm/io.h>
 #include <clk.h>
 #include <common.h>
 #include <dm.h>
 #include <dm/platform_data/pl022_spi.h>
-#include <fdtdec.h>
-#include <linux/bitops.h>
-#include <linux/bug.h>
 #include <linux/io.h>
-#include <linux/kernel.h>
 #include <spi.h>
 
 #define SSP_CR0		0x000