amd/00730F01: Clean the Microcode updating

According to the comments of
https://review.coreboot.org/c/coreboot/+/41719
, which is about Microcode patch for amd/picasso.
Change the code with the same way.

The changes include:
1. combine the microcode_xxx.c and update_microcode.c
   into one source.
2. Redefine the microcode updating function to eliminate
   the parameter. Get the revision ID in the black box.
   Reduce the depth of function calls.
3. Get the revision ID by bitwise calculation instead of
   lookup table.
4. Reduce the confusing type casts.
5. Squash some lines.

We do not change the way it used to be. The code assume
only one microcode is integrated in CBFS. If needed in future,
41719 is the example of integrating multiple binaries.

And, 41719 depends on the definition in this patch.

Change-Id: I8b0da99db0d3189058f75e199f05492c4e6c5881
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42094
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/include/cpu/amd/microcode.h

@@ -1,7 +1,6 @@
 #ifndef CPU_AMD_MICROCODE_H
 #define CPU_AMD_MICROCODE_H
 
-void update_microcode(u32 cpu_deviceid);
-void amd_update_microcode_from_cbfs(u16 equivalent_processor_rev_id);
+void amd_update_microcode_from_cbfs(void);
 
 #endif /* CPU_AMD_MICROCODE_H */