WHENCE: Add new radeon firmware

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

WHENCE

@@ -1874,6 +1874,8 @@ File: radeon/mullins_sdma.bin
 File: radeon/mullins_sdma1.bin
 File: radeon/mullins_uvd.bin
 File: radeon/mullins_vce.bin
+File: radeon/banks_k_2_smc.bin
+File: radeon/si58_mc.bin
 
 Licence: Redistributable. See LICENSE.radeon for details.