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/phycore_imx8mp.h b/include/configs/phycore_imx8mp.h
index 7a15edd..8c5ffee 100644
--- a/include/configs/phycore_imx8mp.h
+++ b/include/configs/phycore_imx8mp.h
@@ -37,7 +37,7 @@
 	"fdt_file=" CONFIG_DEFAULT_FDT_FILE "\0" \
 	"ip_dyn=yes\0" \
 	"mmcdev=" __stringify(CONFIG_SYS_MMC_ENV_DEV) "\0" \
-	"mmcpart=" __stringify(CONFIG_SYS_MMC_IMG_LOAD_PART) "\0" \
+	"mmcpart=1\0" \
 	"mmcroot=2\0" \
 	"mmcautodetect=yes\0" \
 	"mmcargs=setenv bootargs console=${console} " \
@@ -95,6 +95,5 @@
 /* USDHC */
 #define CONFIG_SYS_FSL_USDHC_NUM	2
 #define CONFIG_SYS_FSL_ESDHC_ADDR       0
-#define CONFIG_SYS_MMC_IMG_LOAD_PART	1
 
 #endif /* __PHYCORE_IMX8MP_H */