x86: Change default FRAMEBUFFER_VESA_MODE of some boards

This changes some boards' default FRAMEBUFFER_VESA_MODE to use 32-bit
pixel format for better VxWorks compatibility.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/minnowmax_defconfig b/configs/minnowmax_defconfig
index 3547713..627f1d8 100644
--- a/configs/minnowmax_defconfig
+++ b/configs/minnowmax_defconfig
@@ -57,5 +57,5 @@
 CONFIG_USB_STORAGE=y
 CONFIG_USB_KEYBOARD=y
 CONFIG_FRAMEBUFFER_SET_VESA_MODE=y
-CONFIG_FRAMEBUFFER_VESA_MODE_11A=y
+CONFIG_FRAMEBUFFER_VESA_MODE_11B=y
 CONFIG_CONSOLE_SCROLL_LINES=5