Remove CONFIG_SYS_MMC_IMG_LOAD_PART from CONFIG namespace

This option is used as part of configuring the default environment for a
number of platforms.  However, it is always set to 1 and the only time
it is part of Kconfig, it is used in a hard-coded manner.  Hard-code the
value in the environment instead.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/imx7-cm.h b/include/configs/imx7-cm.h
index 4a0050b..261ed90 100644
--- a/include/configs/imx7-cm.h
+++ b/include/configs/imx7-cm.h
@@ -32,7 +32,7 @@
 	"fdt_file=imx7-cm.dtb\0" \
 	"fdt_addr=0x83000000\0" \
 	"mmcdev="__stringify(CONFIG_SYS_MMC_ENV_DEV)"\0" \
-	"mmcpart=" __stringify(CONFIG_SYS_MMC_IMG_LOAD_PART) "\0" \
+	"mmcpart=1\0" \
 	"mmcroot=" CONFIG_MMCROOT " rootwait rw\0" \
 	"mmcargs=setenv bootargs console=${console},${baudrate} " \
 		"root=${mmcroot}\0" \
@@ -85,7 +85,6 @@
 #define CONFIG_SYS_FSL_ESDHC_ADDR       USDHC1_BASE_ADDR
 #define CONFIG_SYS_FSL_USDHC_NUM		2
 
-#define CONFIG_SYS_MMC_IMG_LOAD_PART	1
 #define CONFIG_MMCROOT					"/dev/mmcblk0p2"  /* USDHC1 */
 
 /* USB Configs */