x86/microcode/intel: Define staging state struct

Define a staging_state struct to simplify function prototypes by consolidating
relevant data, instead of passing multiple local variables.

Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Tested-by: Anselm Busse <abusse@amazon.de>
Link: https://lore.kernel.org/20250320234104.8288-1-chang.seok.bae@intel.com

Author: ChangSeokBae

arch/x86/kernel/cpu/microcode/intel.c

@@ -54,6 +54,23 @@ struct extended_sigtable {
 	struct extended_signature	sigs[];
 };
 
+/**
+ * struct staging_state - Track the current staging process state
+ *
+ * @mmio_base:		MMIO base address for staging
+ * @ucode_len:		Total size of the microcode image
+ * @chunk_size:		Size of each data piece
+ * @bytes_sent:		Total bytes transmitted so far
+ * @offset:		Current offset in the microcode image
+ */
+struct staging_state {
+	void __iomem		*mmio_base;
+	unsigned int		ucode_len;
+	unsigned int		chunk_size;
+	unsigned int		bytes_sent;
+	unsigned int		offset;
+};
+
 #define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE)
 #define EXT_HEADER_SIZE		(sizeof(struct extended_sigtable))
 #define EXT_SIGNATURE_SIZE	(sizeof(struct extended_signature))