arm: socfpga: gen5: don't zero bss in board_init_f()

The socfpga gen5 SPL manually zeroed bss in board_init_f(). Now that the
DDR driver does not use bss any more, bss is not used before board_init_r()
and we can remove this hack.

bss is normally zeroed by crt0.S, but after board_init_f(), before
board_init_r(). socfpga just had this double-zeroing because it invalidly
used bss in board_init_f() already (during DDR initialization).
Signed-off-by: NSimon Goldschmidt <simon.k.r.goldschmidt@gmail.com>

arch/arm/mach-socfpga/spl_gen5.c

@@ -79,8 +79,6 @@ void board_init_f(ulong dummy)
 		writel(SYSMGR_ECC_OCRAM_DERR  | SYSMGR_ECC_OCRAM_EN,
 		       &sysmgr_regs->eccgrp_ocram);
 
-	memset(__bss_start, 0, __bss_end - __bss_start);
-
 	socfpga_sdram_remap_zero();
 	socfpga_pl310_clear();