[CORE] vmm_devdrv: Renaming vmm_devdrv_bus_find_device()

Renaming vmm_devdrv_bus_find_device() function to linux-like
vmm_devdrv_bus_find_device_by_name()

Signed-off-by: Pranav Sawargaonkar <pranav.sawargaonkar@gmail.com>
[CORE] vmm_devdrv: Adding vmm_devdrv_bus_find_device() function.

Adding linux-like vmm_devdrv_bus_find_device() function to find
a device on a bus by providing a match function.

Signed-off-by: Pranav Sawargaonkar <pranav.sawargaonkar@gmail.com>
[DRIVERS] sunxi: remove unused attrval variable in clk driver.

Signed-off-by: Jean-Christophe DUBOIS <jcd@tribudubois.net>