bcm53xx: rename PHY patches to use 07* prefix

This is not a strict rule but it matches better this one:
7xx - network / phy driver patches

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

diff --git a/target/linux/bcm53xx/patches-4.4/089-0001-phy-bcm-ns-usb2-new-driver-for-USB-2.0-PHY-on-Norths.patch b/target/linux/bcm53xx/patches-4.4/070-0001-phy-bcm-ns-usb2-new-driver-for-USB-2.0-PHY-on-Norths.patch
similarity index 100%
rename from target/linux/bcm53xx/patches-4.4/089-0001-phy-bcm-ns-usb2-new-driver-for-USB-2.0-PHY-on-Norths.patch
rename to target/linux/bcm53xx/patches-4.4/070-0001-phy-bcm-ns-usb2-new-driver-for-USB-2.0-PHY-on-Norths.patch

diff --git a/target/linux/bcm53xx/patches-4.4/089-0002-phy-bcm-ns-usb2-checking-the-wrong-variable.patch b/target/linux/bcm53xx/patches-4.4/070-0002-phy-bcm-ns-usb2-checking-the-wrong-variable.patch
similarity index 100%
rename from target/linux/bcm53xx/patches-4.4/089-0002-phy-bcm-ns-usb2-checking-the-wrong-variable.patch
rename to target/linux/bcm53xx/patches-4.4/070-0002-phy-bcm-ns-usb2-checking-the-wrong-variable.patch