brcm63xx: move bcm963268bu_p300 to dts

target/linux/brcm63xx/base-files/lib/brcm63xx.sh

target/linux/brcm63xx/dts/bcm963268bu_p300.dts

target/linux/brcm63xx/image/Makefile

...IPS-BCM63XX-populate-the-compatible-to-board_info-l.patch

target/linux/brcm63xx/patches-3.14/511-board_V2500V.patch

...es-3.14/520-bcm63xx-add-support-for-96368MVWG-board.patch

...linux/brcm63xx/patches-3.14/560-board_963268gu_p300.patch

target/linux/brcm63xx/patches-3.14/561-board_WAP-5813n.patch

target/linux/brcm63xx/patches-3.14/562-board_VR-3025u.patch

target/linux/brcm63xx/patches-3.14/563-board_VR-3025un.patch

...linux/brcm63xx/patches-3.14/564-board_P870HW-51a_v2.patch

target/linux/brcm63xx/patches-3.14/565-board_hw520.patch

target/linux/brcm63xx/patches-3.14/566-board_A4001N.patch

.../linux/brcm63xx/patches-3.14/567-board_dsl-2751b_e1.patch

...ux/brcm63xx/patches-3.14/568-board_DGND3700v1_3800B.patch

...3xx/patches-3.14/810-BCM63XX-move-kernel-behind-CFE.patch

...IPS-BCM63XX-populate-the-compatible-to-board_info-l.patch

target/linux/brcm63xx/patches-3.18/511-board_V2500V.patch

...es-3.18/520-bcm63xx-add-support-for-96368MVWG-board.patch

...linux/brcm63xx/patches-3.18/560-board_963268gu_p300.patch