sandbox: iommu: remove lmb allocation in the driver

The sandbox iommu driver uses the LMB module to allocate a particular
range of memory for the device virtual address(DVA). This used to work
earlier since the LMB memory map was caller specific and not
global. But with the change to make the LMB allocations global and
persistent, adding this memory range has other side effects. On the
other hand, the sandbox iommu test expects to see this particular
value of the DVA. Use the DVA address directly, instead of mapping it
in the LMB memory map, and then have it allocated.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/sandbox/include/asm/test.h

@@ -49,6 +49,10 @@ struct unit_test_state;
 #define PCI_EA_BAR2_MAGIC		0x72727272
 #define PCI_EA_BAR4_MAGIC		0x74747474
 
+/* Used by the sandbox iommu driver */
+#define SANDBOX_IOMMU_DVA_ADDR		0x89abc000
+#define SANDBOX_IOMMU_PAGE_SIZE		SZ_4K
+
 enum {
 	SANDBOX_IRQN_PEND = 1,	/* Interrupt number for 'pending' test */
 };