target: arm: mmu-arm.S: use APSR_nzcv instead of r15 in mrc operand

commit c4abbdd718514202dedebf83b1c674fe08821ec4
Author: mojyack <[email protected]>
Date:   Fri Apr 24 22:43:38 2026 +0900

    target: arm: mmu-arm.S: use APSR_nzcv instead of r15 in mrc operand
    
    Change-Id: Ie27d323ac497fe8d63cee89d2c0722caa293cd25

diff --git a/firmware/target/arm/mmu-arm.S b/firmware/target/arm/mmu-arm.S
index 85903ec798..47738e764f 100644
--- a/firmware/target/arm/mmu-arm.S
+++ b/firmware/target/arm/mmu-arm.S
@@ -336,7 +336,7 @@ discard_dcache_range:
 
 commit_dcache:
 #ifdef HAVE_TEST_AND_CLEAN_CACHE
-    mrc     p15, 0, r15, c7, c10, 3 @ test and clean dcache
+    mrc     p15, 0, APSR_nzcv, c7, c10, 3 @ test and clean dcache
     bne     commit_dcache
     mov     r1, #0
 #else
@@ -367,7 +367,7 @@ commit_dcache:
 
 commit_discard_dcache:
 #ifdef HAVE_TEST_AND_CLEAN_CACHE
-    mrc     p15, 0, r15, c7, c14, 3 @ test, clean and invalidate dcache
+    mrc     p15, 0, APSR_nzcv, c7, c14, 3 @ test, clean and invalidate dcache
     bne     commit_discard_dcache
     mov     r1, #0
 #else
-- 
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