s390/pci: mark function(s) __always_inline

Always inline asm inlines with variable operands for "i" constraints,
since they won't compile if the compiler would decide to not inline
them.
Reported-by: NMichal Kubecek <mkubecek@suse.cz>
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NVasily Gorbik <gor@linux.ibm.com>

arch/s390/pci/pci_clp.c

@@ -66,7 +66,7 @@ static inline int clp_get_ilp(unsigned long *ilp)
 /*
  * Call Logical Processor with c=0, the give constant lps and an lpcb request.
  */
-static inline int clp_req(void *data, unsigned int lps)
+static __always_inline int clp_req(void *data, unsigned int lps)
 {
 	struct { u8 _[CLP_BLK_SIZE]; } *req = data;
 	u64 ignored;