declare DGEMM_BETA in KERNEL.ARMV8 rather than the generic KERNEL

Author: Zeyiii

kernel/arm64/KERNEL

@@ -34,7 +34,7 @@ ifndef SGEMM_BETA
 SGEMM_BETA = ../generic/gemm_beta.c
 endif
 ifndef DGEMM_BETA
-DGEMM_BETA = ../arm64/dgemm_beta.S
+DGEMM_BETA = ../generic/gemm_beta.c
 endif
 ifndef CGEMM_BETA
 CGEMM_BETA = ../generic/zgemm_beta.c

kernel/arm64/KERNEL.ARMV8

@@ -102,6 +102,8 @@ CDOTKERNEL     = zdot.S
 ZDOTKERNEL     = zdot.S
 DSDOTKERNEL    = dot.S
 
+DGEMM_BETA     = dgemm_beta.S
+
 SGEMMKERNEL    =  sgemm_kernel_$(SGEMM_UNROLL_M)x$(SGEMM_UNROLL_N).S
 STRMMKERNEL    =  strmm_kernel_$(SGEMM_UNROLL_M)x$(SGEMM_UNROLL_N).S
 ifneq ($(SGEMM_UNROLL_M), $(SGEMM_UNROLL_N))