ARM: tegra: note that p2371-2180 is Jetson TX1

p2371-2180 is the engineering board name for the Jetson TX1 developer
kit. Update Kconfig description and help text to make this obvious to
everyone.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>

arch/arm/mach-tegra/tegra210/Kconfig

@@ -19,12 +19,12 @@ config TARGET_P2371_0000
 	  a GPIO expansion header, and an analog audio jack.
 
 config TARGET_P2371_2180
-	bool "NVIDIA Tegra210 P2371-2180 board"
+	bool "NVIDIA Tegra210 P2371-2180 (Jetson TX1) board"
 	help
-	  P2371-2180 is a P2180 CPU board married to a P2597 I/O board. The
-	  combination contains SoC, DRAM, eMMC, SD card slot, HDMI, USB
-	  micro-B port, Ethernet via USB3, USB3 host port, SATA, PCIe, and
-	  two GPIO expansion headers.
+	  P2371-2180 (Jetson TX1 developer kit) is a P2180 CPU board married
+	  to a P2597 I/O board. The combination contains SoC, DRAM, eMMC, SD
+	  card slot, HDMI, USB micro-B port, Ethernet via USB3, USB3 host
+	  port, SATA, PCIe, and two GPIO expansion headers.
 
 config TARGET_P2571
 	bool "NVIDIA Tegra210 P2571 base board"