sama5d3-eds: linux: Compile kernel for size

The kernel size exceeds the partition allocated in
the bootargs and the sam-ba loading script.  Compiling
for size reduces the kernel memory footprint to be
similar to what it has been in the past.

Signed-off-by: Jerry Ray <[email protected]>

Author: Jerry0443

board/microchip/sama5d3_eds/linux.config

@@ -17,6 +17,7 @@ CONFIG_CGROUP_CPUACCT=y
 CONFIG_NAMESPACES=y
 CONFIG_USER_NS=y
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 # CONFIG_KALLSYMS is not set
 CONFIG_EMBEDDED=y
 CONFIG_SLAB=y