Change UTF8 chars in Kconfig help text about Oprofile AMD barcelona

Fixes screwing up text output when doing a make oldconfig and viewing
help text of "OProfile AMD IBS support". When the terminal is
not using an UTF8 locale / LANG. "make config" breaks terminal output
and its not possible to continue.

(Change added by changeset 852402cc Tue Jul 22 21:09:06 2008)

Signed-off-by: Jesper Dangaard Brouer <[e-mail]>
Signed-off-by: Robert Richter <[e-mail]>

arch/Kconfig

···
           Instruction-Based Sampling (IBS) is a new profiling
           technique that provides rich, precise program performance
           information. IBS is introduced by AMD Family10h processors
-          (AMD Opteron Quad-Core processor “Barcelona”) to overcome
+          (AMD Opteron Quad-Core processor "Barcelona") to overcome
           the limitations of conventional performance counter
           sampling.