regulator: stpmic1: Fix kernel-doc notation warnings

No functional modification involved.

drivers/regulator/stpmic1_regulator.c:31: warning: expecting prototype for struct stpmic1. Prototype was for struct stpmic1_regulator_cfg instead.

Reported-by: Abaci Robot <[e-mail]>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=7206
Signed-off-by: Jiapeng Chong <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/stpmic1_regulator.c

···
 #include <dt-bindings/mfd/st,stpmic1.h>
 
 /**
- * struct stpmic1 regulator description: this structure is used as driver data
+ * struct stpmic1_regulator_cfg - this structure is used as driver data
  * @desc: regulator framework description
  * @mask_reset_reg: mask reset register address
  * @mask_reset_mask: mask rank and mask reset register mask