[PATCH v3 2/2] arm64: mm: Use asid feature macro for cheanup

[Yunfeng Ye <yeyunfeng@huawei.com>]

The commit 95b54c3e4c92 ("KVM: arm64: Add feature register flag
definitions") introduce the ID_AA64MMFR0_ASID_8 and ID_AA64MMFR0_ASID_16
macros.

We can use these macros for cheanup in get_cpu_asid_bits().

No functional change.

Signed-off-by: Yunfeng Ye <yeyunfeng@huawei.com>
Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
v2 -> v3:
 - Delete the first blank line
 - Add "Signed-off-by" and "Reviewed-by"

v1 -> v2:
 - Split the patch

 arch/arm64/mm/context.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index bbc2708fe928..b8b4cf0bcf39 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -50,10 +50,10 @@ static u32 get_cpu_asid_bits(void)
 		pr_warn("CPU%d: Unknown ASID size (%d); assuming 8-bit\n",
 					smp_processor_id(),  fld);
 		fallthrough;
-	case 0:
+	case ID_AA64MMFR0_ASID_8:
 		asid = 8;
 		break;
-	case 2:
+	case ID_AA64MMFR0_ASID_16:
 		asid = 16;
 	}

-- 
2.27.0