Revert "exynos: Enable PSHOLD in SPL"

This reverts commit eb0dd9986c3883820ff888c3738b013c0a7d918c.

arch/arm/cpu/armv7/exynos/lowlevel_init.c

@@ -49,8 +49,6 @@ int do_lowlevel_init(void)
 
 	arch_cpu_init();
 
-	set_ps_hold_ctrl();
-
 	reset_status = get_reset_status();
 
 	switch (reset_status) {