CMSIS-DSP : Correcting issue 1248

ARM_MATH_DSP is not behind a define guard

CMSIS/DSP/Source/BasicMathFunctions/arm_dot_prod_f32.c

@@ -158,7 +158,7 @@ void arm_dot_prod_f32(
         blkCnt--;
     }
     
-#if __aarch64__
+#if defined(__aarch64__)
     sum = vpadds_f32(vpadd_f32(vget_low_f32(accum), vget_high_f32(accum)));
 #else
     tmp = vpadd_f32(vget_low_f32(accum), vget_high_f32(accum));

CMSIS/DSP/Source/FilteringFunctions/arm_conv_partial_q7.c

@@ -64,7 +64,7 @@ arm_status arm_conv_partial_q7(
         uint32_t numPoints)
 {
 
-#if ARM_MATH_DSP
+#if defined(ARM_MATH_DSP)
 
   const q7_t *pIn1;                                    /* InputA pointer */
   const q7_t *pIn2;                                    /* InputB pointer */

CMSIS/DSP/Source/MatrixFunctions/arm_mat_cholesky_f32.c

@@ -264,7 +264,7 @@ arm_status arm_mat_cholesky_f32(
              k+=4;
           }
 
-#if __aarch64__
+#if defined(__aarch64__)
           sum0 = vpadds_f32(vpadd_f32(vget_low_f32(acc0), vget_high_f32(acc0)));
           sum1 = vpadds_f32(vpadd_f32(vget_low_f32(acc1), vget_high_f32(acc1)));
           sum2 = vpadds_f32(vpadd_f32(vget_low_f32(acc2), vget_high_f32(acc2)));
@@ -322,7 +322,7 @@ arm_status arm_mat_cholesky_f32(
              k+=4;
           }
 
-#if __aarch64__
+#if defined(__aarch64__)
           sum = vpadds_f32(vpadd_f32(vget_low_f32(acc), vget_high_f32(acc)));
 #else
           tmp = vpadd_f32(vget_low_f32(acc), vget_high_f32(acc));