sparc32: handle leon in cpu.c

A few hardcoded constant were replaced by symbolic
versions to improve readability

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Daniel Hellstrom <daniel@gaisler.com>
Cc: Konrad Eisele <konrad@gaisler.com>
diff --git a/arch/sparc/include/asm/psr.h b/arch/sparc/include/asm/psr.h
index c02c735..cee7ed9 100644
--- a/arch/sparc/include/asm/psr.h
+++ b/arch/sparc/include/asm/psr.h
@@ -35,7 +35,9 @@
 #define PSR_VERS    0x0f000000         /* cpu-version field          */
 #define PSR_IMPL    0xf0000000         /* cpu-implementation field   */
 
+#define PSR_VERS_SHIFT		24
 #define PSR_IMPL_SHIFT		28
+#define PSR_VERS_SHIFTED_MASK	0xf
 #define PSR_IMPL_SHIFTED_MASK	0xf
 
 #define PSR_IMPL_TI		0x4