oss: JZ4750D: Fix spin_lock/spin_unlock calls
usb gadget: JZ4750D: Remove UDC_USE_LB_CACHE option and a hack from file_storage.c
MIPS: JZ4750D: Modernize CPU_FREQ
MIPS: JZ4750D: defconfig: Remove CONFIG_CPU_FREQ_JZ in favor of standard CONFIG_CPU_FREQ