ltq-adsl-mei: fix 'inline' declaration warning

Adjust the 'inline' declaration order to fix the build warning:

/home/db/owrt/build_dir/target-mips_24kc_musl/linux-lantiq_xway/ltq-adsl-mei-danube/ltq-adsl-mei/drv_mei_cpe.c:188:1: error: 'inline' is not at beginning of declaration [-Werror=old-style-declaration]
  188 | static void inline MEI_MASK_AND_ACK_IRQ(int x)
      | ^~~~~~

Signed-off-by: Shiji Yang <[email protected]>

fix inline declaration warning

Signed-off-by: Shiji Yang <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/18744
Signed-off-by: Robert Marko <[email protected]>
(cherry picked from commit 335a88df64694dd297a49a89fd38ac8d45c48079)
Signed-off-by: Nora Matthias Schiffer <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/20440
Signed-off-by: Hauke Mehrtens <[email protected]>

package/kernel/lantiq/ltq-adsl-mei/src/drv_mei_cpe.c

@@ -185,7 +185,7 @@ static void *g_xdata_addr = NULL;
 static u32 *mei_arc_swap_buff = NULL;	//  holding swap pages
 
 extern void ltq_mask_and_ack_irq(struct irq_data *d);
-static void inline MEI_MASK_AND_ACK_IRQ(int x)
+static inline void MEI_MASK_AND_ACK_IRQ(int x)
 {
 	struct irq_data d;
 	d.hwirq = x;