Input: synaptics-rmi4 - use 4-argument i2c_smbus_read_block_data()

Pass the transfer length to i2c_smbus_read_block_data() in
smb_block_read().

Link: https://patch.msgid.link/20261024-i2c-smbus-read-block-data-v1-5-19bb97467982@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>