style(asm): range over the kernel generator's statement count

Assisted-by: GLM 5.3 Flash

asm/arm64_poolflush_test.go

@@ -34,7 +34,7 @@ func pooledKernel(head string, n int, tail string) string {
 		b.WriteString("\n")
 	}
 	b.WriteString("TEXT \u00b7poolmid(SB), NOSPLIT, $0-0\n")
-	for i := 0; i < n; i++ {
+	for i := range n {
 		b.WriteString("\tMOVD\tR1, ")
 		b.WriteString(decimal(0x2000000 + 8*i + 4))
 		b.WriteString("(R2)\n")
@@ -217,7 +217,7 @@ func pooledKernelFor(text string, n int, tail string) string {
 	b.WriteString("#include \"textflag.h\"\n")
 	b.WriteString(text)
 	b.WriteString("\n")
-	for i := 0; i < n; i++ {
+	for i := range n {
 		b.WriteString("\tMOVD\tR1, ")
 		b.WriteString(decimal(0x2000000 + 8*i + 4))
 		b.WriteString("(R2)\n")