arm64: kvm: Fix copy-and-paste error in bhb templates for v5.10 stable

stable inclusion
from stable-v5.10.107
commit 7a0d13ef67a1084e1a77bf4d2334cc482699f861
category: bugfix
bugzilla: 186460 https://gitee.com/src-openeuler/kernel/issues/I53MHA
CVE: CVE-2022-23960

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=7a0d13ef67a1084e1a77bf4d2334cc482699f861

--------------------------------

KVM's infrastructure for spectre mitigations in the vectors in v5.10 and
earlier is different, it uses templates which are used to build a set of
vectors at runtime.

There are two copy-and-paste errors in the templates: __spectre_bhb_loop_k24
should loop 24 times and __spectre_bhb_loop_k32 32.

Fix these.
Reported-by: NPavel Machek <pavel@denx.de>
Link: https://lore.kernel.org/all/20220310234858.GB16308@amd/Signed-off-by: NJames Morse <james.morse@arm.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NChen Jiahao <chenjiahao16@huawei.com>
Reviewed-by: NLiao Chang <liaochang1@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

arch/arm64/kvm/hyp/smccc_wa.S

@@ -68,7 +68,7 @@ SYM_DATA_START(__spectre_bhb_loop_k24)
 	esb
 	sub	sp, sp, #(8 * 2)
 	stp	x0, x1, [sp, #(8 * 0)]
-	mov	x0, #8
+	mov	x0, #24
 2:	b	. + 4
 	subs	x0, x0, #1
 	b.ne	2b
@@ -85,7 +85,7 @@ SYM_DATA_START(__spectre_bhb_loop_k32)
 	esb
 	sub	sp, sp, #(8 * 2)
 	stp	x0, x1, [sp, #(8 * 0)]
-	mov	x0, #8
+	mov	x0, #32
 2:	b	. + 4
 	subs	x0, x0, #1
 	b.ne	2b