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/ls1046ardb_qspi_spl_defconfig b/configs/ls1046ardb_qspi_spl_defconfig
index 184c137..975cc58 100644
--- a/configs/ls1046ardb_qspi_spl_defconfig
+++ b/configs/ls1046ardb_qspi_spl_defconfig
@@ -67,3 +67,4 @@
 CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_XHCI_DWC3=y
 CONFIG_SPL_GZIP=y
+CONFIG_EFI_LOADER_BOUNCE_BUFFER=y