drivers/db8500-cpufreq: delete dangling include

There was a dangling #include <mach/id.h> in the cpufreq
file missing from commit
7a4f26097d389c16c9956bc03b81532698d97d64
"ARM: ux500: de-globalize <mach/id.h>"

Causing build regressions when building with cpufreq
support.

Cc: arm@kernel.org
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/cpufreq/db8500-cpufreq.c

@@ -15,7 +15,6 @@
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/clk.h>
-#include <mach/id.h>
 
 static struct cpufreq_frequency_table *freq_table;
 static struct clk *armss_clk;