board: ls1046a: enable EFI_LOADER_BOUNCE_BUFFER

EFI applications need bounce buffers to work properly on these
platforms.

Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
Reviewed-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
diff --git a/configs/ls1046aqds_lpuart_defconfig b/configs/ls1046aqds_lpuart_defconfig
index 5b5800a..9c7e690 100644
--- a/configs/ls1046aqds_lpuart_defconfig
+++ b/configs/ls1046aqds_lpuart_defconfig
@@ -57,3 +57,4 @@
 CONFIG_DM_USB=y
 CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_XHCI_DWC3=y
+CONFIG_EFI_LOADER_BOUNCE_BUFFER=y