reset: uniphier: fix non static symbol warnings

Fixes the following sparse warnings:

drivers/reset/reset-uniphier.c:68:34: warning:
 symbol 'uniphier_sld3_sys_reset_data' was not declared. Should it be static?
drivers/reset/reset-uniphier.c:73:34: warning:
 symbol 'uniphier_pro4_sys_reset_data' was not declared. Should it be static?
drivers/reset/reset-uniphier.c:81:34: warning:
 symbol 'uniphier_pro5_sys_reset_data' was not declared. Should it be static?
drivers/reset/reset-uniphier.c:89:34: warning:
 symbol 'uniphier_pxs2_sys_reset_data' was not declared. Should it be static?
drivers/reset/reset-uniphier.c:103:34: warning:
 symbol 'uniphier_ld11_sys_reset_data' was not declared. Should it be static?
drivers/reset/reset-uniphier.c:108:34: warning:
 symbol 'uniphier_ld20_sys_reset_data' was not declared. Should it be static?
drivers/reset/reset-uniphier.c:137:34: warning:
 symbol 'uniphier_sld3_mio_reset_data' was not declared. Should it be static?
drivers/reset/reset-uniphier.c:157:34: warning:
 symbol 'uniphier_pro5_sd_reset_data' was not declared. Should it be static?
drivers/reset/reset-uniphier.c:174:34: warning:
 symbol 'uniphier_ld4_peri_reset_data' was not declared. Should it be static?
drivers/reset/reset-uniphier.c:187:34: warning:
 symbol 'uniphier_pro4_peri_reset_data' was not declared. Should it be static?

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>