lantiq: ltq-ifxos: add kernel 5.10 compatiblity

ioremap has provided non-cached semantics by default since the Linux 2.6
days and was removed with kernel version 5.6.

Signed-off-by: Mathias Kresin <dev@kresin.me>

package/kernel/lantiq/ltq-ifxos/patches/100-compat.patch

@@ -132,7 +132,7 @@
     if ( check_mem_region(physicalAddr, addrRangeSize_byte) )
     {
        IFXOS_PRN_USR_ERR_NL( IFXOS, IFXOS_PRN_LEVEL_ERR, 
-@@ -98,6 +100,16 @@ IFX_int32_t IFXOS_Phy2VirtMap(
+@@ -98,10 +100,25 @@ IFX_int32_t IFXOS_Phy2VirtMap(
  
     /* can't fail */
     request_mem_region(physicalAddr, addrRangeSize_byte, pName);
@@ -148,4 +148,13 @@
 +#endif
  
     /* remap memory (not cache able): physical --> virtual */
++#if LINUX_VERSION_CODE < KERNEL_VERSION(5,6,0)
     pVirtAddr = (IFX_uint8_t *)ioremap_nocache( physicalAddr,
+                                                addrRangeSize_byte );
++#else
++   pVirtAddr = (IFX_uint8_t *)ioremap(physicalAddr, addrRangeSize_byte);
++#endif
++
+    if (pVirtAddr == IFX_NULL)
+    {
+       IFXOS_PRN_USR_ERR_NL( IFXOS, IFXOS_PRN_LEVEL_ERR,