configs: stm32mp1: activate CONFIG_ERRNO_STR

Add support of errno_str, used in command pmic and regulator.
Signed-off-by: NPatrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: NPatrice Chotard <patrice.chotard@st.com>

configs/stm32mp15_basic_defconfig

@@ -140,4 +140,5 @@ CONFIG_VIDEO_STM32=y
 CONFIG_VIDEO_STM32_DSI=y
 CONFIG_VIDEO_STM32_MAX_XRES=1280
 CONFIG_VIDEO_STM32_MAX_YRES=800
+CONFIG_ERRNO_STR=y
 CONFIG_FDT_FIXUP_PARTITIONS=y

configs/stm32mp15_trusted_defconfig

@@ -127,4 +127,5 @@ CONFIG_VIDEO_STM32=y
 CONFIG_VIDEO_STM32_DSI=y
 CONFIG_VIDEO_STM32_MAX_XRES=1280
 CONFIG_VIDEO_STM32_MAX_YRES=800
+CONFIG_ERRNO_STR=y
 CONFIG_FDT_FIXUP_PARTITIONS=y