configs: BPI-R2: Disable EFI Grub workaround

The EFI Grub workaround on BananaPi R2 slows down the boot process to
the point, that the watchdog will trigger a reboot before the kernel can
reset it. Fix this by disabeling the workaround.

Signed-off-by: Matthias Brugger <mbrugger@suse.com>
diff --git a/configs/mt7623n_bpir2_defconfig b/configs/mt7623n_bpir2_defconfig
index d36ff56..fb20cb1 100644
--- a/configs/mt7623n_bpir2_defconfig
+++ b/configs/mt7623n_bpir2_defconfig
@@ -53,3 +53,4 @@
 CONFIG_MTK_TIMER=y
 CONFIG_WDT_MTK=y
 CONFIG_LZMA=y
+# CONFIG_EFI_GRUB_ARM32_WORKAROUND is not set