ARM: SPEAr13xx: Fix typo "ARCH_HAVE_CPUFREQ"

Do what commit f12a500e
("ARM: SPEAr13xx: Enable CONFIG_ARCH_HAS_CPUFREQ") wanted to do.

[arnd: fix botched merge from changing the Kconfig file]

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>