[edk2-platforms][PATCH 2/4] RPi3: add support for the v1.2 Pi 2B.

["Andrei Warkentin" <andrey.warkentin@gmail.com>]

v1.2 (not older) actually uses the same BCM2837 SoC as
Pi 3, and is thus a 64-bit device that this firmware
easily supports as a minor variant of the Pi 3.

The difference from Pi 3 is choice of UART (PL011), no WiFi,
no BT and slower clock due to thermal problems caused by
older board design.

Signed-off-by: Andrei Warkentin <andrey.warkentin@gmail.com>
---
 Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c | 4 ++--
 Platform/RaspberryPi/RPi3/Readme.md                | 1 +
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
index 1091e680..c90c2530 100644
--- a/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
+++ b/Platform/RaspberryPi/Drivers/ConfigDxe/ConfigDxe.c
@@ -322,9 +322,9 @@ ApplyVariables (
     ASSERT_EFI_ERROR (Status);
   }
 
-  if (mModelFamily == 3) {
+  if (mModelFamily == 3 || mModelFamily == 2) {
     /*
-     * Pi 3: either Arasan or SdHost goes to SD card.
+     * Pi 2B v1.2 / Pi 3: either Arasan or SdHost goes to SD card.
      *
      * Switching two groups around, so disable both first.
      *
diff --git a/Platform/RaspberryPi/RPi3/Readme.md b/Platform/RaspberryPi/RPi3/Readme.md
index d63d6767..3484c92c 100644
--- a/Platform/RaspberryPi/RPi3/Readme.md
+++ b/Platform/RaspberryPi/RPi3/Readme.md
@@ -17,6 +17,7 @@ Raspberry Pi is a trademark of the [Raspberry Pi Foundation](http://www.raspberr
 # Hardware Supported
 
 The RPi3 target supports Pi revisions based on the BCM2837 SoC:
+- Raspberry Pi 2B v1.2 (older versions are *not* compatible)
 - Raspberry Pi 3A+
 - Raspberry Pi 3B
 - Raspberry Pi 3B+
-- 
2.17.1