LoongArch64: Fixed utest kernel_regress:skx_avx

kernel/loongarch64/rot_lasx.S

@@ -1036,7 +1036,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     add.d Y, Y, INCY
     xvfmul.d VT0, VX1, VXC
     xvfmadd.d VT0, VX3, VXS, VT0
-    xvfmul.d VT1, VX0, VXS
+    xvfmul.d VT1, VX1, VXS
     xvfmsub.d VT1, VX3, VXC, VT1
     xvstelm.d VT0, XX, 0, 0
     add.d XX, XX, INCX

kernel/loongarch64/rot_lsx.S

@@ -1142,7 +1142,6 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifdef DOUBLE
     vinsgr2vr.d VX0, t1, 0
     vinsgr2vr.d VX0, t2, 1
-    add.d X, X, INCX
     ld.d t1, Y, 0 * SIZE
     add.d Y, Y, INCY
     ld.d t2, Y, 0 * SIZE
@@ -1199,7 +1198,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     add.d Y, Y, INCY
     VMUL VT0, VX1, VXC
     VFMADD VT0, VX3, VXS, VT0
-    VMUL VT1, VX0, VXS
+    VMUL VT1, VX1, VXS
     VMSUB VT1, VX3, VXC, VT1
     vstelm.d VT0, XX, 0, 0
     add.d XX, XX, INCX
@@ -1223,7 +1222,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     add.d Y, Y, INCY
     VMUL VT0, VX1, VXC
     VFMADD VT0, VX3, VXS, VT0
-    VMUL VT1, VX0, VXS
+    VMUL VT1, VX1, VXS
     VMSUB VT1, VX3, VXC, VT1
     vstelm.d VT0, XX, 0, 0
     add.d XX, XX, INCX
@@ -1296,7 +1295,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     add.d Y, Y, INCY
     VMUL VT0, VX1, VXC
     VFMADD VT0, VX3, VXS, VT0
-    VMUL VT1, VX0, VXS
+    VMUL VT1, VX1, VXS
     VMSUB VT1, VX3, VXC, VT1
     vstelm.w VT0, XX, 0, 0
     add.d XX, XX, INCX