MIPS: Loongson1C: Add board support

Adds basic platform devices for Loongson1C, including serial port
and ethernet.

Signed-off-by: Yang Ling <gnaygnil@gmail.com>
Cc: keguang.zhang@gmail.com
Cc: chenhc@lemote.com
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13304/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 212ff92..6fba0ef 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1402,6 +1402,16 @@
 	  The Loongson 1B is a 32-bit SoC, which implements the MIPS32
 	  release 2 instruction set.
 
+config CPU_LOONGSON1C
+	bool "Loongson 1C"
+	depends on SYS_HAS_CPU_LOONGSON1C
+	select CPU_LOONGSON1
+	select ARCH_WANT_OPTIONAL_GPIOLIB
+	select LEDS_GPIO_REGISTER
+	help
+	  The Loongson 1C is a 32-bit SoC, which implements the MIPS32
+	  release 2 instruction set.
+
 config CPU_MIPS32_R1
 	bool "MIPS32 Release 1"
 	depends on SYS_HAS_CPU_MIPS32_R1
@@ -1851,6 +1861,9 @@
 config SYS_HAS_CPU_LOONGSON1B
 	bool
 
+config SYS_HAS_CPU_LOONGSON1C
+	bool
+
 config SYS_HAS_CPU_MIPS32_R1
 	bool