cxl: remove dead Kconfig options

Remove the CXL_KERNEL_API and CXL_EEH Kconfig options, as they were only
needed to coordinate the merging of the cxlflash driver. Also remove the
stub implementation of cxl_perst_reloads_same_image() in cxlflash which is
only used if CXL_EEH isn't defined (i.e. never).

Suggested-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

drivers/misc/cxl/Kconfig

@@ -7,14 +7,6 @@ config CXL_BASE
 	default n
 	select PPC_COPRO_BASE
 
-config CXL_KERNEL_API
-	bool
-	default n
-
-config CXL_EEH
-	bool
-	default n
-
 config CXL_AFU_DRIVER_OPS
 	bool
 	default n
@@ -23,8 +15,6 @@ config CXL
 	tristate "Support for IBM Coherent Accelerators (CXL)"
 	depends on PPC_POWERNV && PCI_MSI && EEH
 	select CXL_BASE
-	select CXL_KERNEL_API
-	select CXL_EEH
 	select CXL_AFU_DRIVER_OPS
 	default m
 	help

drivers/scsi/cxlflash/main.h

@@ -100,8 +100,4 @@ struct asyc_intr_info {
 #define SCAN_HOST	0x04
 };
 
-#ifndef CONFIG_CXL_EEH
-#define cxl_perst_reloads_same_image(_a, _b) do { } while (0)
-#endif
-
 #endif /* _CXLFLASH_MAIN_H */