[PATCH] riscv: add Siflower RISC-V SoC family Kconfig support

[Chuanhong Guo <gch981213@gmail.com>]

Siflower RISC-V SoCs, including SF21A6826, SF21H8898 and some other
upcomping chips, are RISC-V chips with T-Head C908 cores for home
routers and gateways. Add a Kconfig entry named ARCH_SIFLOWER for
them.
Notably these chips uses ARM PL011 for UART. ARM_AMBA is selected
for its driver.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
---
 arch/riscv/Kconfig.socs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
index 1916cf7ba450..2a700c51594d 100644
--- a/arch/riscv/Kconfig.socs
+++ b/arch/riscv/Kconfig.socs
@@ -19,6 +19,15 @@ config ARCH_SIFIVE
 	help
 	  This enables support for SiFive SoC platform hardware.
 
+config ARCH_SIFLOWER
+	def_bool SOC_SIFLOWER
+
+config SOC_SIFLOWER
+	bool "Siflower RISC-V SoCs"
+	select ARM_AMBA if TTY
+	help
+	  This enables support for Siflower RISC-V SoC platform hardware.
+
 config ARCH_SOPHGO
 	bool "Sophgo SoCs"
 	help
-- 
2.48.1