parisc: Make EWOULDBLOCK be equal to EAGAIN on parisc

On Linux, only parisc uses a different value for EWOULDBLOCK which
causes a lot of troubles for applications not checking for both values.
Since the hpux compat is long dead, make EWOULDBLOCK behave the same as
all other architectures.
Signed-off-by: Guy Martin <gmsoft@tuxicoman.be>
Signed-off-by: Helge Deller <deller@gmx.de>

arch/parisc/include/uapi/asm/errno.h

@@ -106,7 +106,7 @@
 
 #define	EALREADY	244	/* Operation already in progress */
 #define	EINPROGRESS	245	/* Operation now in progress */
-#define	EWOULDBLOCK	246	/* Operation would block (Linux returns EAGAIN) */
+#define	EWOULDBLOCK	EAGAIN	/* Operation would block (Not HPUX compliant) */
 #define	ENOTEMPTY	247	/* Directory not empty */
 #define	ENAMETOOLONG	248	/* File name too long */
 #define	ELOOP		249	/* Too many symbolic links encountered */