ARM: davinci: use is IS_ENABLED macro

This patches replaces #if defined() by IS_ENABLED macro, which provides
better readability.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm/mach-davinci/board-da830-evm.c

@@ -298,11 +298,7 @@ static const short da830_evm_emif25_pins[] = {
 	-1
 };
 
-#if defined(CONFIG_MMC_DAVINCI) || defined(CONFIG_MMC_DAVINCI_MODULE)
-#define HAS_MMC	1
-#else
-#define HAS_MMC	0
-#endif
+#define HAS_MMC		IS_ENABLED(CONFIG_MMC_DAVINCI)
 
 #ifdef CONFIG_DA830_UI_NAND
 static struct mtd_partition da830_evm_nand_partitions[] = {