iio: sx9324: Fix default precharge internal resistance register

Fix the default value for the register that set the resistance:
it has to be 0x10 per datasheet.

Fixes: 4c18a890dff8d ("iio:proximity:sx9324: Add SX9324 support")
Cc: [e-mail]
Signed-off-by: Gwendal Grignou <[e-mail]>
Reviewed-by: Stephen Boyd <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/proximity/sx9324.c

···
 #define SX9324_REG_AFE_PH2		0x2a
 #define SX9324_REG_AFE_PH3		0x2b
 #define SX9324_REG_AFE_CTRL8		0x2c
-#define SX9324_REG_AFE_CTRL8_RESFILTN_4KOHM 0x02
+#define SX9324_REG_AFE_CTRL8_RESERVED	0x10
+#define SX9324_REG_AFE_CTRL8_RESFILTIN_4KOHM 0x02
 #define SX9324_REG_AFE_CTRL9		0x2d
 #define SX9324_REG_AFE_CTRL9_AGAIN_1	0x08
 
···
 	{ SX9324_REG_AFE_PH2, 0x1a },
 	{ SX9324_REG_AFE_PH3, 0x16 },
 
-	{ SX9324_REG_AFE_CTRL8, SX9324_REG_AFE_CTRL8_RESFILTN_4KOHM },
+	{ SX9324_REG_AFE_CTRL8, SX9324_REG_AFE_CTRL8_RESERVED |
+		SX9324_REG_AFE_CTRL8_RESFILTIN_4KOHM },
 	{ SX9324_REG_AFE_CTRL9, SX9324_REG_AFE_CTRL9_AGAIN_1 },
 
 	{ SX9324_REG_PROX_CTRL0,