ARM: tegra: split p2771-0000 build

There are multiple versions of p2771-0000 board. There are SW visible
incompatible differences between the versions, and they are relevant to
U-Boot. Create separate "A02" and "B00" defconfigs (named after the first
and/or only board rev the defconfig supports) so that users can select
which build they want.

With the minimal set of HW currently enabled in U-Boot, the differences
are irrelevant, hence the DT files aren't different. However, that will
change in a future patch.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/configs/p2771-0000-a02_defconfig b/configs/p2771-0000-a02_defconfig
new file mode 100644
index 0000000..1fe25f5
--- /dev/null
+++ b/configs/p2771-0000-a02_defconfig
@@ -0,0 +1,31 @@
+CONFIG_ARM=y
+CONFIG_TEGRA=y
+CONFIG_TEGRA186=y
+CONFIG_TARGET_P2771_0000=y
+CONFIG_DEFAULT_DEVICE_TREE="tegra186-p2771-0000-a02"
+CONFIG_OF_SYSTEM_SETUP=y
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_PROMPT="Tegra186 (P2771-0000 A02) # "
+# CONFIG_CMD_IMI is not set
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_FLASH is not set
+CONFIG_CMD_MMC=y
+CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_USB=y
+# CONFIG_CMD_FPGA is not set
+CONFIG_CMD_GPIO=y
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_DHCP=y
+# CONFIG_CMD_NFS is not set
+CONFIG_CMD_MII=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_EXT2=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_FAT=y
+CONFIG_CMD_FS_GENERIC=y
+CONFIG_SYS_NS16550=y
+CONFIG_USB=y
+CONFIG_DM_USB=y