SWDEV-344211 - Fix hipHostMalloc tests (#2823)

- Increase allocation size to 30MB to make sure new page table allocations happen
- Change validation criteria to check for increase in VRAM usage for visible HIP devices

Change-Id: Ie5bf1a89ceda0ff50140f426235047adcca0fdea

tests/src/runtimeApi/memory/hipHostMallocTests.cpp

@@ -61,7 +61,7 @@ Testcase Scenarios :
  */
 #define LIB_ROCMSMI "librocm_smi64.so"
 #define NUM_BYTES 1000
-#define ALLOC_SIZE (1*1024*1024)
+#define ALLOC_SIZE (30*1024*1024)
 
 
 /**
@@ -246,7 +246,11 @@ bool validatePageTableAllocations(const char *devList, int devCnt) {
     }
 
     for (indx = 0; indx < numdev; indx++) {
-      if (current[indx] - prev[indx])
+      // For visible hip devices, there should be increase in VRAM usage
+      // due to page table allocations
+      // For NON visible hip devices, there can be reduction in VRAM usage
+      // due to removal of page tables from them
+      if (current[indx] > prev[indx])
         changeCnt++;
     }