loongarch: Fixed {s/d/c/z}sum LASX opt

Author: XiWeiGu

kernel/loongarch64/csum_lasx.S

@@ -104,7 +104,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     xvfadd.s res1, VX0, res1
     xvfadd.s res1, VX1, res1
     xvfadd.s res1, VX2, res1
-    xvfadd.s res1, VX2, res1
+    xvfadd.s res1, VX3, res1
 #endif
     .align 3
 
@@ -246,7 +246,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     xvfadd.s res1, VX0, res1
     xvfadd.s res1, VX1, res1
     xvfadd.s res1, VX2, res1
-    xvfadd.s res1, VX2, res1
+    xvfadd.s res1, VX3, res1
 #endif
     .align 3
 

kernel/loongarch64/sum_lasx.S

@@ -96,7 +96,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     xvfadd.s res1, VX0, res1
     xvfadd.s res1, VX1, res1
     xvfadd.s res1, VX2, res1
-    xvfadd.s res1, VX2, res1
+    xvfadd.s res1, VX3, res1
 #endif
     .align 3
 
@@ -200,7 +200,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     xvfadd.s res1, VX0, res1
     xvfadd.s res1, VX1, res1
     xvfadd.s res1, VX2, res1
-    xvfadd.s res1, VX2, res1
+    xvfadd.s res1, VX3, res1
 #endif
     .align 3