LoongArch: Complete KSave registers definition

According to the "LoongArch Reference Manual Volume 1: Basic
Architecture", the KSave registers (SAVE0-SAVE15) are defined in
Section 7.4.16 "Data Save (SAVE)" and listed in Table 7-1 "Control
and Status Registers Overview". These registers occupy the CSR
addresses from 0x30 to 0x3F, with 16 registers in total.

This patch completes the definitions of KS9 to KS15, so as to match
the architecture specification.

Reviewed-by: Wentao Guan <guanwentao@uniontech.com>
Signed-off-by: Yanteng Si <siyanteng@cqsoftware.com.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Author: Yanteng Si

arch/loongarch/include/asm/loongarch.h

@@ -451,6 +451,13 @@
 #define LOONGARCH_CSR_KS6		0x36
 #define LOONGARCH_CSR_KS7		0x37
 #define LOONGARCH_CSR_KS8		0x38
+#define LOONGARCH_CSR_KS9		0x39
+#define LOONGARCH_CSR_KS10		0x3a
+#define LOONGARCH_CSR_KS11		0x3b
+#define LOONGARCH_CSR_KS12		0x3c
+#define LOONGARCH_CSR_KS13		0x3d
+#define LOONGARCH_CSR_KS14		0x3e
+#define LOONGARCH_CSR_KS15		0x3f
 
 /* Exception allocated KS0, KS1 and KS2 statically */
 #define EXCEPTION_KS0			LOONGARCH_CSR_KS0