Radix cross Linux Toolchains

Index: 2.39/Makefile
===================================================================
--- 2.39/Makefile	(revision 39)
+++ 2.39/Makefile	(revision 40)
@@ -246,7 +246,7 @@
 endif
 
 ifeq ($(TOOLCHAIN),$(TOOLCHAIN_RK358X_GLIBC))
-environment += CFLAGS="-g -O3 -march=armv8.2-a -mcpu=cortex-a75.cortex-a55 -mabi=lp64"
+environment += CFLAGS="-g -O3 -march=armv8.2-a -mtune=cortex-a76.cortex-a55 -mabi=lp64"
 endif
 
 ifeq ($(TOOLCHAIN),$(TOOLCHAIN_A33XX_GLIBC))