net: pch_gbe: Allow build on MIPS_GENERIC kernel

MIPS Boston board, which is using MIPS_GENERIC kernel is using
EG20T PCH and thus need this driver.

Dependency of PCH_GBE, PTP_1588_CLOCK_PCH is also fixed for
MIPS_GENERIC.

Note that CONFIG_PCH_GBE is selected in arch/mips/configs/generic/
board-boston.config for a while, some how it's never wired up
in Kconfig.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230607055953.34110-1-jiaxun.yang@flygoat.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/oki-semi/pch_gbe/Kconfig

@@ -5,7 +5,7 @@
 
 config PCH_GBE
 	tristate "OKI SEMICONDUCTOR IOH(ML7223/ML7831) GbE"
-	depends on PCI && (X86_32 || COMPILE_TEST)
+	depends on PCI && (MIPS_GENERIC || X86_32 || COMPILE_TEST)
 	depends on PTP_1588_CLOCK
 	select MII
 	select PTP_1588_CLOCK_PCH

drivers/ptp/Kconfig

@@ -102,7 +102,7 @@ config PTP_1588_CLOCK_INES
 
 config PTP_1588_CLOCK_PCH
 	tristate "Intel PCH EG20T as PTP clock"
-	depends on X86_32 || COMPILE_TEST
+	depends on MIPS_GENERIC || X86_32 || COMPILE_TEST
 	depends on HAS_IOMEM && PCI
 	depends on NET
 	depends on PTP_1588_CLOCK