[PATCH 1/2] RISC-V: Stop warning about Zabha and Zacas

[Ben Dooks <ben.dooks@codethink.co.uk>]

The zabha (atomic byte and halfword) and zacas (atomic compare/swap)
are now being used by the kernel, so parse these and stop the warnings
when running make C=1 on current kernels.

WARNING: invalid argument to '-march': '_zacas_zabha'

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
 target-riscv.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target-riscv.c b/target-riscv.c
index d30be04b..80c25285 100644
--- a/target-riscv.c
+++ b/target-riscv.c
@@ -22,6 +22,8 @@
 #define RISCV_ZICBOM	(1 << 12)
 #define RISCV_ZIHINTPAUSE	(1 << 13)
 #define RISCV_VECTOR	(1 << 14)
+#define RISCV_ATOMIC_CAS (1 << 15)
+#define RISCV_ATOMIC_BH	 (1 << 16)
 
 static unsigned int riscv_flags;
 
@@ -43,6 +45,8 @@ static void parse_march_riscv(const char *arg)
 		{ "d",		RISCV_DOUBLE|RISCV_FDIV|RISCV_ZICSR },
 		{ "c",		RISCV_COMP },
 		{ "v",		RISCV_VECTOR|RISCV_FPU|RISCV_ZICSR },
+		{ "_zacas",	RISCV_ATOMIC_CAS },
+		{ "_zabha",	RISCV_ATOMIC_BH },
 		{ "_zicsr",	RISCV_ZICSR },
 		{ "_zifencei",	RISCV_ZIFENCEI },
 		{ "_zicbom",	RISCV_ZICBOM },
-- 
2.37.2.352.g3c44437643