regmap: sdw-mbq: Reorder regmap_mbq_context struct for better packing

Avoid a hole in struct regmap_mbq_context by shuffling the members
slightly. Pahole before:

struct regmap_mbq_context {
struct device * dev; /* 0 8 */
struct sdw_slave * sdw; /* 8 8 */
struct regmap_sdw_mbq_cfg cfg; /* 16 32 */
int val_size; /* 48 4 */

/* XXX 4 bytes hole, try to pack */

bool (*readable_reg)(struct device *, unsigned int); /* 56 8 */

/* size: 64, cachelines: 1, members: 5 */
/* sum members: 60, holes: 1, sum holes: 4 */
};

Pahole after:

struct regmap_mbq_context {
struct device * dev; /* 0 8 */
struct sdw_slave * sdw; /* 8 8 */
bool (*readable_reg)(struct device *, unsigned int); /* 16 8 */
struct regmap_sdw_mbq_cfg cfg; /* 24 32 */
int val_size; /* 56 4 */

/* size: 64, cachelines: 1, members: 5 */
/* padding: 4 */
};

Signed-off-by: Charles Keepax <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

drivers/base/regmap/regmap-sdw-mbq.c

···
 struct regmap_mbq_context {
 	struct device *dev;
 
+	bool (*readable_reg)(struct device *dev, unsigned int reg);
+
 	struct regmap_sdw_mbq_cfg cfg;
 
 	int val_size;
-	bool (*readable_reg)(struct device *dev, unsigned int reg);
 };
 
 static int regmap_sdw_mbq_size(struct regmap_mbq_context *ctx, unsigned int reg)