sched_ext: Make string params of __ENUM_set() const

A small change to improve type safety/const correctness.
__COMPAT_read_enum() already has const string parameters.

It fixes a warning when using the header in C++ code:

  error: ISO C++11 does not allow conversion from string literal
         to 'char *' [-Werror,-Wwritable-strings]

That's because string literals have type char[N] in C and
const char[N] in C++.

Signed-off-by: Kuba Piecuch <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>

Author: Kuba Piecuch

tools/sched_ext/include/scx/enums.h

@@ -9,7 +9,7 @@
 #ifndef __SCX_ENUMS_H
 #define __SCX_ENUMS_H
 
-static inline void __ENUM_set(u64 *val, char *type, char *name)
+static inline void __ENUM_set(u64 *val, const char *type, const char *name)
 {
 	bool res;