COMMON: Use __stringify() instead of MK_STR()

Kill multiple occurances and redeclaration of MK_STR
in favor of __stringify().

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Signed-off-by: Tom Rini <trini@ti.com>
diff --git a/include/configs/P1022DS.h b/include/configs/P1022DS.h
index 1d97e95..b3c850d 100644
--- a/include/configs/P1022DS.h
+++ b/include/configs/P1022DS.h
@@ -540,8 +540,8 @@
 
 #define	CONFIG_EXTRA_ENV_SETTINGS				\
 	"netdev=eth0\0"						\
-	"uboot=" MK_STR(CONFIG_UBOOTPATH) "\0"			\
-	"ubootaddr=" MK_STR(CONFIG_SYS_TEXT_BASE) "\0"		\
+	"uboot=" __stringify(CONFIG_UBOOTPATH) "\0"		\
+	"ubootaddr=" __stringify(CONFIG_SYS_TEXT_BASE) "\0"	\
 	"tftpflash=tftpboot $loadaddr $uboot && "		\
 		"protect off $ubootaddr +$filesize && "		\
 		"erase $ubootaddr +$filesize && "		\