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/imx8mm-cl-iot-gate.h b/include/configs/imx8mm-cl-iot-gate.h
index 36e0a42..991839c 100644
--- a/include/configs/imx8mm-cl-iot-gate.h
+++ b/include/configs/imx8mm-cl-iot-gate.h
@@ -79,7 +79,7 @@
 	"initrd_addr=0x43800000\0"		\
 	"bootm_size=0x10000000\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" \
 	"mmcautodetect=yes\0" \
 	"mmcargs=setenv bootargs console=${console} root=${mmcroot}\0 " \
@@ -152,8 +152,6 @@
 #define CONFIG_SYS_FSL_USDHC_NUM	2
 #define CONFIG_SYS_FSL_ESDHC_ADDR	0
 
-#define CONFIG_SYS_MMC_IMG_LOAD_PART	1
-
 #define CONFIG_ETHPRIME			"FEC"
 
 #define CONFIG_FEC_XCV_TYPE		RGMII