lib: sign conflict in sbi_tlb_entry_process()

Compiling sbi_tlb_entry_process() with GCC 11 and -Wextra yields:

lib/sbi/sbi_tlb.c: In function ‘sbi_tlb_process_count’:
lib/sbi/sbi_tlb.c:206:31:
error: comparison of integer expressions of different signedness:
‘u32’ {aka ‘unsigned int’} and ‘int’ [-Werror=sign-compare]
  206 |                 if (deq_count > count)

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Xiang W <wxjstz@126.com>
diff --git a/lib/sbi/sbi_tlb.c b/lib/sbi/sbi_tlb.c
index 2ba1b7b..8bbe92b 100644
--- a/lib/sbi/sbi_tlb.c
+++ b/lib/sbi/sbi_tlb.c
@@ -193,10 +193,11 @@
 	}
 }
 
-static void sbi_tlb_process_count(struct sbi_scratch *scratch, int count)
+static void sbi_tlb_process_count(struct sbi_scratch *scratch,
+				  unsigned int count)
 {
 	struct sbi_tlb_info tinfo;
-	u32 deq_count = 0;
+	unsigned int deq_count = 0;
 	struct sbi_fifo *tlb_fifo =
 			sbi_scratch_offset_ptr(scratch, tlb_fifo_off);