irqchip: Adjust Kconfig for Loongson

HTVEC will be shared by both MIPS-based and LoongArch-based Loongson
processors (not only Loongson-3), so we adjust its description. HTPIC is
only used by MIPS-based Loongson, so we add a MIPS dependency.
Acked-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

drivers/irqchip/Kconfig

@@ -557,7 +557,7 @@ config LOONGSON_LIOINTC
 
 config LOONGSON_HTPIC
 	bool "Loongson3 HyperTransport PIC Controller"
-	depends on MACH_LOONGSON64
+	depends on MACH_LOONGSON64 && MIPS
 	default y
 	select IRQ_DOMAIN
 	select GENERIC_IRQ_CHIP
@@ -565,12 +565,12 @@ config LOONGSON_HTPIC
 	  Support for the Loongson-3 HyperTransport PIC Controller.
 
 config LOONGSON_HTVEC
-	bool "Loongson3 HyperTransport Interrupt Vector Controller"
+	bool "Loongson HyperTransport Interrupt Vector Controller"
 	depends on MACH_LOONGSON64
 	default MACH_LOONGSON64
 	select IRQ_DOMAIN_HIERARCHY
 	help
-	  Support for the Loongson3 HyperTransport Interrupt Vector Controller.
+	  Support for the Loongson HyperTransport Interrupt Vector Controller.
 
 config LOONGSON_PCH_PIC
 	bool "Loongson PCH PIC Controller"