Rename the tc35892 core/gpio drivers to tc3589x to include
new variants in the same mfd core
Acked-by: NSamuel Ortiz <sameo@linux.intel.com>
Signed-off-by: NSundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@stericsson.com>