SoC common : scripts :refactor the build system. [2/3]

PD#SWPL-174904

Problem:
Refactor the build system.

Solution:
Remove the Compiler value input by arg and add set entry.

Verify:
N/A

Change-Id: If74d0a5a63fe2992bdca4d2df90f9c21277900f9
Signed-off-by: xiaohu.huang <xiaohu.huang@amlogic.com>
diff --git a/env.sh b/env.sh
index 4f42a14..187cd67 100755
--- a/env.sh
+++ b/env.sh
@@ -90,7 +90,7 @@
 SOC=`echo "$PROJECT"|awk '{print $2}'`
 BOARD=`echo "$PROJECT"|awk '{print $3}'`
 PRODUCT=`echo "$PROJECT"|awk '{print $4}'`
-COMPILER=`echo "$PROJECT"|awk '{print $5}'`
+
 # Check current project
 check_build_combination $ARCH $SOC $BOARD $PRODUCT
 err=$?
@@ -106,12 +106,8 @@
 		TOOLCHAIN_KEYWORD="arm-none-eabi"
 		;;
 	arm64)
-		if [ "$COMPILER" == "clang+llvm" ]; then
-			TOOLCHAIN_KEYWORD="arm"
-		else
-			COMPILER="gcc"
-			TOOLCHAIN_KEYWORD="aarch64-none-elf"
-		fi
+		COMPILER="gcc"
+		TOOLCHAIN_KEYWORD="aarch64-none-elf"
 		;;
 	riscv)
 		COMPILER="gcc"