This was broken in 558d72dc5116 (ARM Samsung: fix booting from NAND with
pbl). '_text' is TEXT_BASE when building without pbl and (TEXT_BASE -
SZ_2M) when building with pbl, so this works in both cases.

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Conflicts:
	arch/arm/mach-samsung/lowlevel-s3c24x0.S