ARM: i.MX: external-nand-boot: remove unused i.MX21 entry
external nand boot on i.MX21 depends on broken for a long time no.
As noone cared we remove it now.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1 parent 07b1c63 commit d3945aae042523dbe233fa044b7857a4fb774821
@Sascha Hauer Sascha Hauer authored on 18 Mar 2019
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arch/arm/mach-imx/external-nand-boot.c