mtd: nand: omap: move omap_gpmc.h from arch/arm/include/asm to drivers/mtd/nand

omap_gpmc.h is a generic header used by OMAP NAND driver for all TI platfoms.
Hence this file should be present in generic folder instead of architecture
specific include folder.
Build tested using: ./MAKEALL -s am33xx -s omap3 -s omap4 -s omap5

Signed-off-by: Pekon Gupta <pekon@ti.com>
diff --git a/drivers/mtd/nand/omap_elm.c b/drivers/mtd/nand/omap_elm.c
index 64dca4f..55a631d 100644
--- a/drivers/mtd/nand/omap_elm.c
+++ b/drivers/mtd/nand/omap_elm.c
@@ -16,7 +16,7 @@
 #include <common.h>
 #include <asm/io.h>
 #include <asm/errno.h>
-#include <asm/omap_gpmc.h>
+#include <linux/mtd/omap_gpmc.h>
 #include <asm/omap_elm.h>
 #include <asm/arch/hardware.h>
 
diff --git a/drivers/mtd/nand/omap_gpmc.c b/drivers/mtd/nand/omap_gpmc.c
index b54e39e..452e40f 100644
--- a/drivers/mtd/nand/omap_gpmc.c
+++ b/drivers/mtd/nand/omap_gpmc.c
@@ -9,7 +9,7 @@
 #include <asm/io.h>
 #include <asm/errno.h>
 #include <asm/arch/mem.h>
-#include <asm/omap_gpmc.h>
+#include <linux/mtd/omap_gpmc.h>
 #include <linux/mtd/nand_ecc.h>
 #include <linux/bch.h>
 #include <linux/compiler.h>