Revert "crypto: caam/jr - Remove extra memory barrier during job ring dequeue"

This reverts commit bbfcac5f.

It caused a crash regression on powerpc:

https://lore.kernel.org/linux-crypto/87pnp2aflz.fsf@concordia.ellerman.id.au/Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/caam/jr.c

@@ -213,7 +213,7 @@ static void caam_jr_dequeue(unsigned long devarg)
 		mb();
 
 		/* set done */
-		wr_reg32_relaxed(&jrp->rregs->outring_rmvd, 1);
+		wr_reg32(&jrp->rregs->outring_rmvd, 1);
 
 		jrp->out_ring_read_index = (jrp->out_ring_read_index + 1) &
 					   (JOBR_DEPTH - 1);

drivers/crypto/caam/regs.h

@@ -96,14 +96,6 @@ cpu_to_caam(16)
 cpu_to_caam(32)
 cpu_to_caam(64)
 
-static inline void wr_reg32_relaxed(void __iomem *reg, u32 data)
-{
-	if (caam_little_end)
-		writel_relaxed(data, reg);
-	else
-		writel_relaxed(cpu_to_be32(data), reg);
-}
-
 static inline void wr_reg32(void __iomem *reg, u32 data)
 {
 	if (caam_little_end)