linux/types.h: fix typo unchar

unsigned char should be called uchar and not unchar.

This fixes a build error in lib/crypto/x509_cert_parser.c.
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>

include/linux/types.h

@@ -85,7 +85,7 @@ typedef unsigned int		u_int;
 typedef unsigned long		u_long;
 
 /* sysv */
-typedef unsigned char		unchar;
+typedef unsigned char		uchar;
 typedef unsigned short		ushort;
 typedef unsigned int		uint;
 typedef unsigned long		ulong;