Refine build process for arm architecture

This commit simplifies the Makefile by removing unnecessary conditions that were based on the architecture type. It mostly affects the CGOFLAG and BUILDFLAGS for 'arm' cases, streamlining the build process specifically for Linux OS and 'arm' architecture, and improving the cross-compilation process overall.

Author: jakule

Makefile

@@ -229,22 +229,12 @@ TEST_LOG_DIR = ${abspath ./test-logs}
 
 # Set CGOFLAG and BUILDFLAGS as needed for the OS/ARCH.
 ifeq ("$(OS)","linux")
-# True if $ARCH == amd64 || $ARCH == arm64
-ifeq ("$(ARCH)","arm64")
-	ifeq ($(IS_NATIVE_BUILD),"no")
-		CGOFLAG += CC=aarch64-linux-gnu-gcc
-	endif
-else ifeq ("$(ARCH)","arm")
+ifeq ("$(ARCH)","arm")
 CGOFLAG = CGO_ENABLED=1
 
-# ARM builds need to specify the correct C compiler
-ifeq ($(IS_NATIVE_BUILD),"no")
-CC=arm-linux-gnueabihf-gcc
-endif
-
 # Add -debugtramp=2 to work around 24 bit CALL/JMP instruction offset.
-BUILDFLAGS = $(ADDFLAGS) -ldflags '-w -s -debugtramp=2 $(KUBECTL_SETVERSION)' -trimpath -buildmode=pie
-endif
+BUILDFLAGS = $(ADDFLAGS) -ldflags '-w -s -debugtramp=2 $(KUBECTL_SETVERSION)' -trimpath
+endif # ARCH == arm
 endif # OS == linux
 
 # Windows requires extra parameters to cross-compile with CGO.