hv: further fix to configurable relocatoin

commit ia23549aa915e7dc2c ("build: make relocation-related code
configurable") adds CONFIG_RELOC to make relocation configurable

This patch corrects the behavior when CONFIG_RELOC is disabled
- Don't use "CFLAGS += -fpie" and put back "LDFLAGS += -static"
- __emalloc(): forced to allocate exactly the asked address, which is
  CONFIG_RAM_START

hypervisor/bsp/uefi/efi/malloc.c

@@ -268,7 +268,11 @@ EFI_STATUS __emalloc(UINTN size, UINTN min_addr, EFI_PHYSICAL_ADDRESS *addr,
 			continue;
 		}
 
+#ifndef CONFIG_RELOC
 		aligned = start;
+#else
+		aligned = min_addr;
+#endif
 		err = allocate_pages(AllocateAddress, mem_type,
 					 nr_pages, &aligned);
 		if (err == EFI_SUCCESS) {