soc/amd/picasso: Adjust I2C ASL

Clarify names as I2C2, etc.  Use iomap.h defines for base addresses.
Update IRQs.

Change-Id: I3800592e4b0bcb681d0dcf24f69e269f845be025
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34915
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/soc/amd/picasso/i2c.c

@@ -73,11 +73,11 @@ const char *i2c_acpi_name(const struct device *dev)
 {
 	switch (dev->path.mmio.addr) {
 	case APU_I2C2_BASE:
-		return "I2CC";
+		return "I2C2";
 	case APU_I2C3_BASE:
-		return "I2CD";
+		return "I2C3";
 	case APU_I2C4_BASE:
-		return "I2CE";
+		return "I2C4";
 	default:
 		return NULL;
 	}