jacinto6evm: use correct TARGET_BOARD_PLATFORM name

We were reusing omap5 here, change it to reflect jacinto6.

This patch goes along with corresponding changes in build system of
device/ti/common-open, device/ti/proprietary-open, and hardware/ti/omap4xxx

Change-Id: I4ba4d523bca85b5117a0914e707592540c6b2507
Signed-off-by: Vishal Mahaveer <vishalm@ti.com>
diff --git a/BoardConfig.mk b/BoardConfig.mk
index f6f977f..d23dfdf 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -43,7 +43,7 @@
 BOARD_KERNEL_CMDLINE := console=ttyO2,115200n8 mem=1024M androidboot.console=ttyO2 androidboot.hardware=jacinto6evmboard vram=20M omapfb.vram=0:16M
 
 TARGET_NO_RADIOIMAGE := true
-TARGET_BOARD_PLATFORM := omap5
+TARGET_BOARD_PLATFORM := jacinto6
 TARGET_BOOTLOADER_BOARD_NAME := jacinto6evm
 
 BOARD_EGL_CFG := device/ti/jacinto6evm/egl.cfg