i3c: ast2600: fix register setting for 545 ohm pullups

The 2k register setting is zero, OR-ing it in doesn't parallel the 2k
and 750 ohm pullups. We need a separate value for the 545 ohm setting.
Reported-by: Lukwinski Zbigniew <zbigniew.lukwinski@linux.intel.com>
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Link: https://lore.kernel.org/r/20230428001849.1775559-1-jk@codeconstruct.com.auSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/i3c/master/ast2600-i3c-master.c

@@ -21,6 +21,7 @@
 #define AST2600_I3CG_REG0_SDA_PULLUP_EN_MASK	GENMASK(29, 28)
 #define AST2600_I3CG_REG0_SDA_PULLUP_EN_2K	(0x0 << 28)
 #define AST2600_I3CG_REG0_SDA_PULLUP_EN_750	(0x2 << 28)
+#define AST2600_I3CG_REG0_SDA_PULLUP_EN_545	(0x3 << 28)
 
 #define AST2600_I3CG_REG1_I2C_MODE		BIT(0)
 #define AST2600_I3CG_REG1_TEST_MODE		BIT(1)
@@ -62,8 +63,7 @@ static int ast2600_i3c_pullup_to_reg(unsigned int ohms, u32 *regp)
 		reg = AST2600_I3CG_REG0_SDA_PULLUP_EN_750;
 		break;
 	case 545:
-		reg = AST2600_I3CG_REG0_SDA_PULLUP_EN_2K |
-			AST2600_I3CG_REG0_SDA_PULLUP_EN_750;
+		reg = AST2600_I3CG_REG0_SDA_PULLUP_EN_545;
 		break;
 	default:
 		return -EINVAL;