drivers: mfd: mfd_ad9952: fix reset magic value

Reset magic value equal 0xDAC is invalid. According to device
specification [1] a valid value is 0x5AC.
Use proper value to make driver aligned with the spec.

[1] https://www.analog.com/media/en/technical-documentation/data-sheets/ad5592r.pdf

Signed-off-by: Lukasz Madej <[email protected]>

Author: LukaszMadejGrinn

drivers/mfd/mfd_ad5592.c

@@ -15,7 +15,7 @@
 #define AD5592_GPIO_READBACK_EN BIT(10)
 #define AD5592_LDAC_READBACK_EN BIT(6)
 #define AD5592_REG_SOFTWARE_RESET 0x0FU
-#define AD5592_SOFTWARE_RESET_MAGIC_VAL 0xDAC
+#define AD5592_SOFTWARE_RESET_MAGIC_VAL 0x5AC
 #define AD5592_REV_VAL_MASK 0x3FF
 #define AD5592_REG_SHIFT_VAL 11
 #define AD5592_REG_READBACK_SHIFT_VAL 2