power:pmic: Rename CONFIG_DIALOG_PMIC defines to CONFIG_DIALOG_POWER

Rename CONFIG_DIALOG_PMIC to CONFIG_DIALOG_POWER

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Stefano Babic <sbabic@denx.de>