netxen_nic: Use {low,upp}er_32_bits() helpers

Use the existing {low,upp}er_32_bits() helpers instead of defining
custom variants.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Reviewed-by: Simon Horman <[e-mail]>
Link: https://patch.msgid.link/319d4[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/ethernet/qlogic/netxen/netxen_nic_ctx.c

···
 #define CRB_CTX_ADDR_REG_HI(FUNC_ID)	(ctx_addr_sig_regs[FUNC_ID][2])
 #define CRB_CTX_SIGNATURE_REG(FUNC_ID)	(ctx_addr_sig_regs[FUNC_ID][1])
 
-#define lower32(x)	((u32)((x) & 0xffffffff))
-#define upper32(x)	((u32)(((u64)(x) >> 32) & 0xffffffff))
-
 static struct netxen_recv_crb recv_crb_registers[] = {
 	/* Instance 0 */
 	{
···
 		NETXEN_CTX_SIGNATURE_V2 : NETXEN_CTX_SIGNATURE;
 
 	NXWR32(adapter, CRB_CTX_ADDR_REG_LO(port),
-			lower32(recv_ctx->phys_addr));
+			lower_32_bits(recv_ctx->phys_addr));
 	NXWR32(adapter, CRB_CTX_ADDR_REG_HI(port),
-			upper32(recv_ctx->phys_addr));
+			upper_32_bits(recv_ctx->phys_addr));
 	NXWR32(adapter, CRB_CTX_SIGNATURE_REG(port),
 			signature | port);
 	return 0;