scripts: spl: fix typo

Typo fix: CONIFG->CONFIG

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Tom Rini <trini@konsulko.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/scripts/Makefile.uncmd_spl b/scripts/Makefile.uncmd_spl
index 15d0836..b399411 100644
--- a/scripts/Makefile.uncmd_spl
+++ b/scripts/Makefile.uncmd_spl
@@ -9,7 +9,7 @@
 ifndef CONFIG_SPL_DM
 CONFIG_DM_SERIAL=
 CONFIG_DM_GPIO=
-CONIFG_DM_I2C=
+CONFIG_DM_I2C=
 CONFIG_DM_SPI=
 CONFIG_DM_SPI_FLASH=
 endif