htm: Fix potential issue with HTM_ERR macro
htm: Fix potential issue with HTM_ERR macro

Braces are fun.

Signed-off-by: Michael Neuling <7b0ab45a730e48a69239010b5b8fe5fa4e8eaac6@neuling.org>

open-power/pdbg,open-power/pdbg,open-power/pdbg