x86/mce/AMD: Pass the bank number to smca_get_bank_type()

Pass the bank number to smca_get_bank_type() since that's all we need.

Also, we should compare the bank number to MAX_NR_BANKS (size of the
smca_banks array) not the number of bank types. Bank types are reused
for multiple banks, so the number of types can be different from the
number of banks in a system and thus we could return an invalid bank
type.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org> # 4.14.x
Cc: <stable@vger.kernel.org> # 4.14.x: 11cf887728a3 x86/MCE/AMD: Define a function to get SMCA bank type
Cc: <stable@vger.kernel.org> # 4.14.x: c6708d50f166 x86/MCE: Report only DRAM ECC as memory errors on AMD systems
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/20180221101900.10326-6-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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