Make TARGET=GENERIC compatible with DYNAMIC_ARCH=1

for issue #2048

Author: martin-frbg

kernel/Makefile.L3

@@ -24,7 +24,7 @@ ifeq ($(TARGET), LOONGSON3B)
 USE_TRMM = 1
 endif
 
-ifeq ($(TARGET), GENERIC)
+ifeq ($(CORE), GENERIC)
 USE_TRMM = 1
 endif