The registers 0x56 and 0x57 of AXP22X PMIC store the value of the
internal temperature of the PMIC.

This patch modifies the name of these registers from AXP22X_PMIC_ADC_H/L
to AXP22X_PMIC_TEMP_H/L so their purpose is clearer.
Signed-off-by: NQuentin Schulz <quentin.schulz@free-electrons.com>
Acked-by: NChen-Yu Tsai <wens@csie.org>
Acked-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>