sunxi: Simplify spl board_init_f function

crt0.S will both memset the bss sectioan and call board_init_r for us,
so there is no need to do either ourselves.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

arch/arm/cpu/armv7/sunxi/board.c

@@ -198,11 +198,6 @@ void board_init_f(ulong dummy)
 	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 #endif
 	sunxi_board_init();
-
-	/* Clear the BSS. */
-	memset(__bss_start, 0, __bss_end - __bss_start);
-
-	board_init_r(NULL, 0);
 }
 #endif