parisc: hpux - Drop support for HP-UX binaries

This patch series drops the support for 32bit HP-UX binaries.

The HP-UX compat layer has always been incomplete and it's unlikely that someone will ever implement it.

Furthermore those two commits which enhance the compatibility of Linux on parisc to other architectures:
f5a408d: parisc: Make EWOULDBLOCK be equal to EAGAIN on parisc
1f25df2: parisc: Reduce SIGRTMIN from 37 to 32 to behave like other Linux architectures
basically make it impossible to implement the HP-UX support correctly.

index 1554a6f..8014727 100644
@@ -291,10 +291,6 @@ config SYSVIPC_COMPAT
 config AUDIT_ARCH
 	def_bool y
 
-config HPUX
-	bool "Support for HP-UX binaries"
-	depends on !64BIT