oem-ibm: make DMA max size configurable

Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
Change-Id: I3dd6f30db4bbf7b6290362b32a4e6e42ef993705
diff --git a/meson_options.txt b/meson_options.txt
index 00ef185..aaacf38 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -5,3 +5,4 @@
 option('utilities', type: 'feature', description: 'Enable debug utilities', value: 'enabled')
 
 option('libpldm-only', type: 'feature', description: 'Only build libpldm', value: 'disabled')
+option('oem-ibm-dma-maxsize', type: 'integer', description: 'OEM-IBM: max DMA size', value: 16773120) #16MB - 4K