drivers: fix log type variables for -fno-common

The zlib compression driver, as well as the aesni-gcm, aesni-mb and openssl
crypto drivers all defined the logtype variable in the header file
directly. This gives errors with gcc 10, due to -fno-common being the
default, so we need to apply the same fix in all cases:
* move the variable definition to a suitable .c file
* mark the forward declaration of the variable in the header as "extern"

Fixes: 0c4e4c16b0 ("compress/zlib: introduce zlib PMD")
Fixes: 90c8a2d02a ("crypto/aesni_gcm: add dynamic logging")
Fixes: 276624ae2e ("crypto/aesni_mb: add dynamic logging")
Fixes: 094b2386f4 ("crypto/openssl: add dynamic logging")
Cc: stable@dpdk.org

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Lukasz Wojciechowski <l.wojciechow@partner.samsung.com>

drivers/compress/zlib/zlib_pmd.c

@@ -7,6 +7,8 @@
 
 #include "zlib_pmd_private.h"
 
+int zlib_logtype_driver;
+
 /** Compute next mbuf in the list, assign data buffer and length,
  *  returns 0 if mbuf is NULL
  */

drivers/compress/zlib/zlib_pmd_private.h

@@ -14,7 +14,7 @@
 
 #define DEF_MEM_LEVEL			8
 
-int zlib_logtype_driver;
+extern int zlib_logtype_driver;
 #define ZLIB_PMD_LOG(level, fmt, args...) \
 	rte_log(RTE_LOG_ ## level, zlib_logtype_driver, "%s(): "fmt "\n", \
 			__func__, ##args)

drivers/crypto/aesni_gcm/aesni_gcm_pmd.c

@@ -13,6 +13,8 @@
 
 #include "aesni_gcm_pmd_private.h"
 
+int aesni_gcm_logtype_driver;
+
 static uint8_t cryptodev_driver_id;
 
 /* setup session handlers */

drivers/crypto/aesni_gcm/aesni_gcm_pmd_private.h

@@ -20,7 +20,7 @@
 /**< AES-NI GCM PMD device name */
 
 /** AES-NI GCM PMD  LOGTYPE DRIVER */
-int aesni_gcm_logtype_driver;
+extern int aesni_gcm_logtype_driver;
 #define AESNI_GCM_LOG(level, fmt, ...) \
 	rte_log(RTE_LOG_ ## level, aesni_gcm_logtype_driver,	\
 			"%s() line %u: "fmt "\n", __func__, __LINE__,	\

drivers/crypto/aesni_mb/aesni_mb_pmd_private.h

@@ -19,7 +19,7 @@ enum aesni_mb_vector_mode {
 /**< AES-NI Multi buffer PMD device name */
 
 /** AESNI_MB PMD LOGTYPE DRIVER */
-int aesni_mb_logtype_driver;
+extern int aesni_mb_logtype_driver;
 
 #define AESNI_MB_LOG(level, fmt, ...)  \
 	rte_log(RTE_LOG_ ## level, aesni_mb_logtype_driver,  \

drivers/crypto/aesni_mb/rte_aesni_mb_pmd.c

@@ -14,6 +14,8 @@
 
 #include "aesni_mb_pmd_private.h"
 
+int aesni_mb_logtype_driver;
+
 #define AES_CCM_DIGEST_MIN_LEN 4
 #define AES_CCM_DIGEST_MAX_LEN 16
 #define HMAC_MAX_BLOCK_SIZE 128

drivers/crypto/openssl/openssl_pmd_private.h

@@ -16,7 +16,7 @@
 /**< Open SSL Crypto PMD device name */
 
 /** OPENSSL PMD LOGTYPE DRIVER */
-int openssl_logtype_driver;
+extern int openssl_logtype_driver;
 #define OPENSSL_LOG(level, fmt, ...)  \
 	rte_log(RTE_LOG_ ## level, openssl_logtype_driver,  \
 			"%s() line %u: " fmt "\n", __func__, __LINE__,  \

drivers/crypto/openssl/rte_openssl_pmd.c

@@ -18,6 +18,7 @@
 
 #define DES_BLOCK_SIZE 8
 
+int openssl_logtype_driver;
 static uint8_t cryptodev_driver_id;
 
 #if (OPENSSL_VERSION_NUMBER < 0x10100000L)