ARM: configs: at91: sama7: remove CONFIG_PWRSEQ_SD8787

Remove CONFIG_PWRSEQ_SD8787 as it is not needed anymore after
fixing mmc core Kconfig.

Fixes: 7574419 ("ARM: configs: sama7: enable ATWILC3000 module driver")
Reported-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>

Author: cristibirsan

arch/arm/configs/sama7_defconfig

@@ -193,7 +193,6 @@ CONFIG_USB_CONFIGFS_MASS_STORAGE=y
 CONFIG_USB_CONFIGFS_F_UVC=y
 CONFIG_USB_G_SERIAL=m
 CONFIG_MMC=y
-CONFIG_PWRSEQ_SD8787=m
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_PLTFM=y
 CONFIG_MMC_SDHCI_OF_AT91=y