[RFC 2/3] common/cnxk: replace variable length array

[Stephen Hemminger <stephen@networkplumber.org>]

This fixes errors when compiled with LTO about large VLA.
../drivers/common/cnxk/roc_platform.c: In function ‘irq_init’:
../drivers/common/cnxk/roc_platform.c:92:14: warning: argument to variable-length array is too large [-Wvla-larger-than=]
   92 |         char irq_set_buf[MSIX_IRQ_SET_BUF_LEN];
      |              ^

Since the number of IRQ is limited by EAL max interrupt vectors
use that define that already exists rather than a function call
hidden in a macro.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/common/cnxk/roc_platform.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/common/cnxk/roc_platform.c b/drivers/common/cnxk/roc_platform.c
index e13cb42285..1fdbf8f051 100644
--- a/drivers/common/cnxk/roc_platform.c
+++ b/drivers/common/cnxk/roc_platform.c
@@ -17,8 +17,8 @@
 #include <sys/ioctl.h>
 #include <unistd.h>
 
-#define MSIX_IRQ_SET_BUF_LEN                                                                       \
-	(sizeof(struct vfio_irq_set) + sizeof(int) * (plt_intr_max_intr_get(intr_handle)))
+#define MSIX_IRQ_SET_BUF_LEN							\
+	(sizeof(struct vfio_irq_set) + sizeof(int) * PLT_MAX_RXTX_INTR_VEC_ID)
 
 static int
 irq_get_info(struct plt_intr_handle *intr_handle)
-- 
2.51.0