soc: mediatek: pwrap: Add kerneldoc for struct pwrap_slv_type

In preparation for adding new members with name abbreviations describe
the struct pwrap_slv_type with kerneldoc to enhance human readability.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
Link: https://lore.kernel.org/r/20230412131216.198313-4-angelogioacchino.delregno@collabora.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

Author: AngeloGioacchino Del Regno

drivers/soc/mediatek/mtk-pmic-wrap.c

@@ -1218,11 +1218,17 @@ struct pwrap_slv_regops {
 	int (*pwrap_write)(struct pmic_wrapper *wrp, u32 adr, u32 wdata);
 };
 
+/**
+ * struct pwrap_slv_type - PMIC device wrapper definitions
+ * @dew_regs:      Device Wrapper (DeW) register offsets
+ * @type:          PMIC Type (model)
+ * @regops:        Register R/W ops
+ * @caps:          Capability flags for the target device
+ */
 struct pwrap_slv_type {
 	const u32 *dew_regs;
 	enum pmic_type type;
 	const struct pwrap_slv_regops *regops;
-	/* Flags indicating the capability for the target slave */
 	u32 caps;
 };