[ARM] pxa: Add bare bones PWM API

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b786e68..c274dbb 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -22,6 +22,9 @@
 	  Europe.  There is an ARM Linux project with a web page at
 	  <http://www.arm.linux.org.uk/>.
 
+config HAVE_PWM
+	bool
+
 config SYS_SUPPORTS_APM_EMULATION
 	bool