linux-boundary, u-boot-script-boundary: Set compatible machine

The compatible machine filter is required to avoid build warnings when
building for other boards, as:

,----[ Build warning ]
| WARNING: Unable to get checksum for linux-boundary
|     SRC_URI entry defconfig: file could not be found
`----

Change-Id: I2f55697fbef29c35b332bfdcc5023c5f70bc9e4b
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
linux-imx (3.0.35): Enable USB for cgtqmx6

Add missing flags in kernel config.
Namely: CONFIG_USB_EHCI_ARC_H1=y and CONFIG_USB_FSL_ARC_OTG=y

Signed-off-by: Pavel Kopylov <pavel.kopylov@gmail.com>