ARM: ux500: add detection for DB8500 ASIC v2.2

Add a macro to properly detect the v2.2 version of the
DB8500 ASIC.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/mach-ux500/include/mach/id.h

@@ -105,6 +105,11 @@ static inline bool cpu_is_u8500v21(void)
 	return cpu_is_u8500() && (dbx500_revision() == 0xB1);
 }
 
+static inline bool cpu_is_u8500v22(void)
+{
+	return cpu_is_u8500() && (dbx500_revision() == 0xB2);
+}
+
 static inline bool cpu_is_u8500v20_or_later(void)
 {
 	return (cpu_is_u8500() && !cpu_is_u8500v10() && !cpu_is_u8500v11());