ANDROID: cpufreq: conservative: fix duplicate 'static' error

Fix following duplicate 'static' declaration error:

drivers/cpufreq/cpufreq_conservative.c:308:1: error: duplicate ‘static’
 static struct dbs_governor cs_governor = {
 ^
scripts/Makefile.build:293: recipe for target 'drivers/cpufreq/cpufreq_conservative.o' failed

Fixes: ("ANDROID: [CPUFREQ] Don't export governors for default governor")
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>