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ARM: i.MX8M: Detect serial downloader mode correctly
like the i.MX6 the i.MX7 and i.MX8M also have a SBMR2 register which
must be consulted for the BOOT_MODE[01] pins before internal bootmode
can be assumed.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
WIP_next-LS master next v2020.07.0 v2020.06.0 v2020.05.0 v2020.04.0
1 parent e42d463 commit 2963bb8fa61b55a708943d6809aa0e41bf7d7fd6
@Sascha Hauer Sascha Hauer authored on 12 Feb 2020
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arch/arm/mach-imx/boot.c