configs: am43xx_evm_defconfig: Enable CONFIG_SPI_FLASH_BAR

AM437x SK and AM437x IDK EVMs have 64MB flash, therefore enable
CONFIG_SPI_FLASH_BAR to access flash regions above 16MB.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Reviewed-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Jagan Teki <jteki@openedev.com>

configs/am43xx_evm_defconfig

@@ -37,6 +37,7 @@ CONFIG_DM=y
 CONFIG_DM_MMC=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_BAR=y
 CONFIG_SYS_NS16550=y
 CONFIG_TI_QSPI=y
 CONFIG_TIMER=y