arm64: defconfig: Enable DRM_POWERVR

Enable the PowerVR DRM driver, as it's used for the GPU in platforms
using the TI AM62x SoCs, such as the TI SK-AM62 and BeaglePlay (2023).
Signed-off-by: Donald Robson <donald.robson@imgtec.com>
Acked-by: Darren Etheridge <detheridge@ti.com>
Link: https://lore.kernel.org/r/2f6af3ebfe9e36c80c03de2dcc2e940dd5dc2c4b.1701773390.git.donald.robson@imgtec.comSigned-off-by: Nishanth Menon <nm@ti.com>

arch/arm64/configs/defconfig

@@ -890,6 +890,7 @@ CONFIG_DRM_PL111=m
 CONFIG_DRM_LIMA=m
 CONFIG_DRM_PANFROST=m
 CONFIG_DRM_TIDSS=m
+CONFIG_DRM_POWERVR=m
 CONFIG_FB=y
 CONFIG_FB_MODE_HELPERS=y
 CONFIG_FB_EFI=y