arm64: defconfig: Add CDNS_DSI and CDNS_PHY config

Enable configs for cdns-dsi and cdns-dphy drivers required for DSI
display on the following platforms:
J721E-EVM, J721E-BeagleBone-AI64, J721S2-EVM, AM68-SK, J722S-EVM,
BeagleY-AI, AM62P5-SK, J784S4-EVM and J742S2-EVM

The DSI wrapper driver used by all the above mentioned platforms,
cdns-dsi-j721e is enabled by default if cdns-dsi config is enabled.

Signed-off-by: Jayesh Choudhary <j-choudhary@ti.com>
Reviewed-by: Judith Mendez <jm@ti.com>
Link: https://lore.kernel.org/r/20250416182930.32132-1-j-choudhary@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>

Author: jayesh-ti

arch/arm64/configs/defconfig

@@ -937,6 +937,7 @@ CONFIG_DRM_TI_SN65DSI86=m
 CONFIG_DRM_ANALOGIX_ANX7625=m
 CONFIG_DRM_I2C_ADV7511=m
 CONFIG_DRM_I2C_ADV7511_AUDIO=y
+CONFIG_DRM_CDNS_DSI=m
 CONFIG_DRM_CDNS_MHDP8546=m
 CONFIG_DRM_IMX8MP_DW_HDMI_BRIDGE=m
 CONFIG_DRM_DW_HDMI_AHB_AUDIO=m
@@ -1577,6 +1578,7 @@ CONFIG_PHY_CAN_TRANSCEIVER=m
 CONFIG_PHY_NXP_PTN3222=m
 CONFIG_PHY_SUN4I_USB=y
 CONFIG_PHY_CADENCE_TORRENT=m
+CONFIG_PHY_CADENCE_DPHY=m
 CONFIG_PHY_CADENCE_DPHY_RX=m
 CONFIG_PHY_CADENCE_SIERRA=m
 CONFIG_PHY_CADENCE_SALVO=m