ARM: imx: Enable PCA953x driver on DH i.MX8MP DHCOM PDK2

Enable PCA953x GPIO expander driver in DH i.MX8MP DHCOM PDK2 configuration.
The PCA9539 GPIO expander is used on production DH i.MX8MP DHCOM SoM rev.200.
This is already enabled in DH i.MX8MP DHCOM PDK3 configuration so align the
two configurations.

Fixes: 9de599ec3d59 ("arm64: dts: imx8mp: Update i.MX8MP DHCOM SoM DT to production rev.200")
Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/configs/imx8mp_dhcom_pdk2_defconfig b/configs/imx8mp_dhcom_pdk2_defconfig
index cbc608d..79b3e96 100644
--- a/configs/imx8mp_dhcom_pdk2_defconfig
+++ b/configs/imx8mp_dhcom_pdk2_defconfig
@@ -182,6 +182,7 @@
 CONFIG_GPIO_HOG=y
 CONFIG_SPL_GPIO_HOG=y
 CONFIG_MXC_GPIO=y
+CONFIG_DM_PCA953X=y
 CONFIG_DM_I2C=y
 # CONFIG_INPUT is not set
 CONFIG_LED=y