bsp/intel-x86: add support for the Intel PCH/PCU SPI controller

The Intel PCH/PCU SPI controller is present in modern Intel hardware and
is used to hold BIOS and other persistent settings. Using this driver it
is possible to upgrade BIOS directly from Linux.

Signed-off-by: Yongxin Liu <yongxin.liu@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

bsp/intel-x86/intel-x86.cfg

@@ -280,6 +280,14 @@ CONFIG_SPI_PXA2XX_PCI=y
 
 CONFIG_VT_HW_CONSOLE_BINDING=y
 
+#
+# MTD SPI
+#
+CONFIG_MTD_SPI_NOR=m
+CONFIG_MTD_SPI_NOR_USE_4K_SECTORS=y
+CONFIG_SPI_INTEL_SPI_PCI=m
+CONFIG_SPI_INTEL_SPI_PLATFORM=m
+
 # Bluetooth device drivers
 CONFIG_BT_HCIBTUSB=m
 

bsp/intel-x86/intel-x86.scc

@@ -32,6 +32,7 @@ include features/hostapd/hostapd.scc
 include features/latencytop/latencytop.scc
 include features/uio/uio.scc
 include features/spi/spi.scc
+include features/mtd/mtd.scc
 include features/spi/spidev.scc
 include features/bluetooth/bluetooth.scc
 include features/input/input.scc