mfd: tps6507: Fix white space warnings reported by checkpatch

WARNING: please, no spaces at the start of a line
+       { "tps6507x", 0 },$

WARNING: please, no spaces at the start of a line
+       { }$

Signed-off-by: Ben Copeland <ben.copeland@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>