soc/amd/picasso: use SMBus timeout in compilation unit

The timeout is fixed and only used in one place. Put the assumption
in the compliation unit utilizing the defintion.

Change-Id: I93c061e74df6b4265fd1c61fc4669410ebc9554f
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38614
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/soc/amd/picasso/include/soc/smbus.h

@@ -19,12 +19,6 @@
 #include <stdint.h>
 #include <soc/iomap.h>
 
-/*
- * Between 1-10 seconds, We should never timeout normally
- * Longer than this is just painful when a timeout condition occurs.
- */
-#define SMBUS_TIMEOUT (100 * 1000 * 10)
-
 int do_smbus_read_byte(u32 mmio, u8 device, u8 address);
 int do_smbus_write_byte(u32 mmio, u8 device, u8 address, u8 val);
 int do_smbus_recv_byte(u32 mmio, u8 device);

src/soc/amd/picasso/smbus.c

@@ -19,6 +19,12 @@
 #include <soc/smbus.h>
 #include <soc/southbridge.h>
 
+/*
+ * Between 1-10 seconds, We should never timeout normally
+ * Longer than this is just painful when a timeout condition occurs.
+ */
+#define SMBUS_TIMEOUT (100 * 1000 * 10)
+
 static u8 controller_read8(u32 base, u8 reg)
 {
 	switch (base) {