[U-Boot] mmc: update MMC_ERASE argument to match Linux kernel.

[Tom Rini]

On Mon, Dec 07, 2015 at 07:50:01AM -0700, Eric Nelson wrote:

> Table 41 of the JEDEC standard for eMMC says that bit 31 of
> the command argument is obsolete when issuing the ERASE
> command (CMD38) on page 115 of this document:
> 	http://www.jedec.org/sites/default/files/docs/jesd84-B45.pdf
> 
> The SD Card Association Physical Layer Simplified Specification also
> makes no mention of the use of bit 31.
> 	https://www.sdcard.org/downloads/pls/part1_410.pdf
> 
> The Linux kernel distinguishes between secure (bit 31 set) and
> non-secure erase, and this patch copies the macro names from
> include/linux/mmc/core.h.
> 
> Tested-by: Fabio Estevam <fabio.estevam at freescale.com>
> Signed-off-by: Eric Nelson <eric at nelint.com>
> Tested-by: Hector Palacios <hector.palacios at digi.com>

Applied to u-boot/master, thanks!

-- 
Tom
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