common: Drop linux/bitops.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/synopsys/emsdp/emsdp.c b/board/synopsys/emsdp/emsdp.c
index c1746b6..91fa94a 100644
--- a/board/synopsys/emsdp/emsdp.c
+++ b/board/synopsys/emsdp/emsdp.c
@@ -9,6 +9,7 @@
 #include <dwmmc.h>
 #include <init.h>
 #include <malloc.h>
+#include <linux/bitops.h>
 
 #include <asm/arcregs.h>
 
diff --git a/board/synopsys/hsdk/clk-lib.h b/board/synopsys/hsdk/clk-lib.h
index c1c105a..970bcd4 100644
--- a/board/synopsys/hsdk/clk-lib.h
+++ b/board/synopsys/hsdk/clk-lib.h
@@ -8,6 +8,7 @@
 #define __BOARD_CLK_LIB_H
 
 #include <common.h>
+#include <linux/bitops.h>
 
 enum clk_ctl_ops {
 	CLK_SET		= BIT(0), /* set frequency */
diff --git a/board/synopsys/hsdk/hsdk.c b/board/synopsys/hsdk/hsdk.c
index a421954..cd11f9d 100644
--- a/board/synopsys/hsdk/hsdk.c
+++ b/board/synopsys/hsdk/hsdk.c
@@ -14,6 +14,7 @@
 #include <irq_func.h>
 #include <log.h>
 #include <asm/cache.h>
+#include <linux/bitops.h>
 #include <linux/delay.h>
 #include <linux/printk.h>
 #include <linux/kernel.h>
diff --git a/board/synopsys/iot_devkit/iot_devkit.c b/board/synopsys/iot_devkit/iot_devkit.c
index 05b63e4..497ea18 100644
--- a/board/synopsys/iot_devkit/iot_devkit.c
+++ b/board/synopsys/iot_devkit/iot_devkit.c
@@ -8,6 +8,7 @@
 #include <init.h>
 #include <malloc.h>
 #include <dwmmc.h>
+#include <linux/bitops.h>
 #include <linux/libfdt.h>
 #include <fdtdec.h>