cxl/core/port: Rename bus.c to port.c

Given it is dominated by port infrastructure, and will only acquire
more, rename bus.c to port.c.
Reviewed-by: Ben Widawsky <ben.widawsky@intel.com>
Link: https://lore.kernel.org/r/164298416136.3018233.15442880970000855425.stgit@dwillia2-desk3.amr.corp.intel.comSigned-off-by: Dan Williams <dan.j.williams@intel.com>

Documentation/driver-api/cxl/memory-devices.rst

@@ -36,10 +36,10 @@ CXL Core
 .. kernel-doc:: drivers/cxl/cxl.h
    :internal:
 
-.. kernel-doc:: drivers/cxl/core/bus.c
+.. kernel-doc:: drivers/cxl/core/port.c
    :doc: cxl core
 
-.. kernel-doc:: drivers/cxl/core/bus.c
+.. kernel-doc:: drivers/cxl/core/port.c
    :identifiers:
 
 .. kernel-doc:: drivers/cxl/core/pmem.c

drivers/cxl/core/Makefile

@@ -2,7 +2,7 @@
 obj-$(CONFIG_CXL_BUS) += cxl_core.o
 
 ccflags-y += -I$(srctree)/drivers/cxl
-cxl_core-y := bus.o
+cxl_core-y := port.o
 cxl_core-y += pmem.o
 cxl_core-y += regs.o
 cxl_core-y += memdev.o

tools/testing/cxl/Kbuild

@@ -25,7 +25,7 @@ cxl_pmem-y += config_check.o
 
 obj-m += cxl_core.o
 
-cxl_core-y := $(CXL_CORE_SRC)/bus.o
+cxl_core-y := $(CXL_CORE_SRC)/port.o
 cxl_core-y += $(CXL_CORE_SRC)/pmem.o
 cxl_core-y += $(CXL_CORE_SRC)/regs.o
 cxl_core-y += $(CXL_CORE_SRC)/memdev.o