drm/rp1: depends on, instead of select, MFD_RP1

According to kconfig-language.txt [1], select should be used only for
"non-visible symbols ... and for symbols with no dependencies". Since
MFD_RP1 both is visible and has a dependency, "select" should not be
used and "depends on" should be used instead.

In particular, this fixes the build of this kernel tree on NixOS, where
its kernel config system will try to answer 'M' to as many config as
possible.

[1] https://www.kernel.org/doc/html/latest/kbuild/kconfig-language.html

Signed-off-by: Ratchanan Srirattanamet <[email protected]>

Author: peat-psuwit

drivers/gpu/drm/rp1/rp1-dpi/Kconfig

@@ -1,8 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config DRM_RP1_DPI
 	tristate "DRM Support for RP1 DPI"
-	depends on DRM
-	select MFD_RP1
+	depends on DRM && MFD_RP1
 	select DRM_GEM_DMA_HELPER
 	select DRM_KMS_HELPER
 	select DRM_VRAM_HELPER

drivers/gpu/drm/rp1/rp1-dsi/Kconfig

@@ -1,8 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config DRM_RP1_DSI
 	tristate "DRM Support for RP1 DSI"
-	depends on DRM
-	select MFD_RP1
+	depends on DRM && MFD_RP1
 	select DRM_GEM_DMA_HELPER
 	select DRM_KMS_HELPER
 	select DRM_MIPI_DSI

drivers/gpu/drm/rp1/rp1-vec/Kconfig

@@ -1,8 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config DRM_RP1_VEC
 	tristate "DRM Support for RP1 VEC"
-	depends on DRM
-	select MFD_RP1
+	depends on DRM && MFD_RP1
 	select DRM_GEM_DMA_HELPER
 	select DRM_KMS_HELPER
 	select DRM_VRAM_HELPER