layerscape: kmod-ppfe: Use ppfe driver as module

In 8274451cb86 kmod-ppfe was changed to built-in because CONFIG_FSL_PPFE
was binary. In 5.10 and 5.15 kernel, PPFE driver can be build as module.

This patch switch kmod-ppfe from build-in to loadable module.
Loadable module helps to avoid hazard: driver is looking for firmware
file before mount root.

Signed-off-by: Pawel Dembicki <[email protected]>

target/linux/layerscape/armv8_64b/config-5.10

@@ -292,8 +292,8 @@ CONFIG_FSL_GUTS=y
 CONFIG_FSL_IFC=y
 CONFIG_FSL_MC_BUS=y
 CONFIG_FSL_MC_DPIO=y
-CONFIG_FSL_PPFE=y
-CONFIG_FSL_PPFE_UTIL_DISABLED=y
+# CONFIG_FSL_PPFE is not set
+# CONFIG_FSL_PPFE_UTIL_DISABLED is not set
 # CONFIG_FSL_QMAN_TEST is not set
 CONFIG_FSL_RCPM=y
 CONFIG_FSL_XGMAC_MDIO=y

target/linux/layerscape/armv8_64b/config-5.15

@@ -293,8 +293,8 @@ CONFIG_FSL_IFC=y
 CONFIG_FSL_MC_BUS=y
 CONFIG_FSL_MC_DPIO=y
 # CONFIG_FSL_MC_UAPI_SUPPORT is not set
-CONFIG_FSL_PPFE=y
-CONFIG_FSL_PPFE_UTIL_DISABLED=y
+# CONFIG_FSL_PPFE is not set
+# CONFIG_FSL_PPFE_UTIL_DISABLED is not set
 # CONFIG_FSL_QMAN_TEST is not set
 CONFIG_FSL_RCPM=y
 CONFIG_FSL_XGMAC_MDIO=y

target/linux/layerscape/modules.mk

@@ -22,7 +22,7 @@ define KernelPackage/ppfe
   SUBMENU:=$(NETWORK_DEVICES_MENU)
   TITLE:=Freescale PPFE Driver support
   DEPENDS:=@TARGET_layerscape
-  KCONFIG:=CONFIG_FSL_PPFE=y \
+  KCONFIG:=CONFIG_FSL_PPFE \
   	CONFIG_FSL_PPFE_UTIL_DISABLED=y
   FILES:=$(LINUX_DIR)/drivers/staging/fsl_ppfe/pfe.ko
   AUTOLOAD:=$(call AutoLoad,35,pfe)