xen/riscv: fix MMIO alignment check in imsic_init()

The MMIO alignment check in imsic_init() incorrectly uses cpu as
the index into mmios[]. The loop index should be used instead.
Otherwise, the alignment check may be performed on the wrong MMIO
address.

Fix the index used in the alignment check and corresponding printk.

Fixes: c9bd8b322e ("xen/riscv: imsic_init() implementation")
Signed-off-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>

xen/arch/riscv/imsic.c

@@ -451,11 +451,11 @@ int __init imsic_init(const struct dt_device_node *node)
             continue;
         }
 
-        if ( !IS_ALIGNED(mmios[cpu].base_addr + reloff,
-                         IMSIC_MMIO_PAGE_SZ) )
+        if ( !IS_ALIGNED(mmios[index].base_addr + reloff, IMSIC_MMIO_PAGE_SZ) )
         {
             printk(XENLOG_WARNING "%s: MMIO address %#lx is not aligned on a page\n",
-                   node->name, msi[cpu].base_addr + reloff);
+                   node->name, mmios[index].base_addr + reloff);
+
             continue;
         }